/* ===== 见信 · 官网首页 =====
   静态站，无外部依赖。字体走系统字体：宋体做标题、黑体做正文。
   颜色、字号、间距都集中在 :root，改主题只动这里。 */

:root {
  --paper: #060b12;
  --paper-2: #0b1119;
  --white: #0f1722;
  --ink: #e9eff6;
  --ink-2: #a6b2c0;
  --ink-3: #7c8998;
  --rule: #1a2430;
  --rule-strong: #2a3847;
  --signal: #e0523f;
  --signal-soft: #2a1714;
  --teal: #7fb6d8;
  --dark: #03060a;
  --dark-2: #070c13;
  --dark-rule: #1c2734;
  --dark-ink: #e9eff6;
  --dark-ink-2: #a0acbb;

  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    system-ui, -apple-system, "Segoe UI", sans-serif;

  --wrap: 1180px;
  --gap: clamp(18px, 4vw, 32px);
  --radius: 2px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

section[id] {
  scroll-margin-top: 88px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  font-feature-settings: "tnum" 1;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

h1, h2, h3, p, ul, ol, figure, blockquote {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

a {
  color: var(--teal);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--ink);
}

strong, b {
  font-weight: 600;
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

/* 深色区块里的焦点环用浅色，保证 3:1 以上可见度 */
.case :focus-visible {
  outline-color: #f4f1ea;
}

::selection {
  background: var(--signal);
  color: var(--white);
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gap);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 12px;
  z-index: 100;
  padding: 12px 18px;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  font-size: 14px;
}

.skip-link:focus {
  top: 12px;
  color: var(--paper);
}

.muted {
  color: var(--ink-2);
}

.small {
  font-size: 13.5px;
  line-height: 1.65;
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font: inherit;
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}

.btn-primary:hover {
  background: var(--signal);
  color: var(--white);
}

.btn-ghost {
  background: transparent;
  border-color: var(--rule-strong);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--ink);
  background: transparent;
  color: var(--ink);
}

.btn-sm {
  min-height: 40px;
  padding: 0 16px;
  font-size: 14.5px;
}

.btn-block {
  width: 100%;
}

.icon-ne {
  margin-left: 2px;
  vertical-align: -1px;
}

/* ---------- 页头 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(6, 11, 18, 0.92);
  border-bottom: 1px solid var(--rule);
  backdrop-filter: saturate(140%) blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  flex: none;
}

.brand-mark {
  flex: none;
  align-self: center;
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.brand-name {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.brand-tag {
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--ink-3);
  padding-left: 10px;
  border-left: 1px solid var(--rule-strong);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: auto;
}

.site-nav > a {
  font-size: 15px;
  color: var(--ink-2);
  text-decoration: none;
  white-space: nowrap;
}

.site-nav > a:hover {
  color: var(--ink);
}

.nav-cta {
  margin-left: 6px;
}

.site-nav > a.nav-cta {
  color: var(--paper);
}

.site-nav > a.nav-cta:hover {
  color: var(--white);
}

.nav-toggle-label {
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  padding: 10px 12px;
  background: transparent;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}

.nav-toggle-bar {
  display: inline-block;
  width: 14px;
  height: 1.5px;
  background: currentColor;
}

/* ---------- 首屏 ---------- */

.hero {
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
  min-height: min(92vh, 900px);
  padding: clamp(56px, 7vw, 96px) 0 clamp(72px, 8vw, 110px);
  border-bottom: 1px solid var(--rule);
}

.hero-bg {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 36%;
  z-index: 0;
  overflow: hidden;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, var(--paper) 0%, rgba(6, 11, 18, 0.78) 16%, rgba(6, 11, 18, 0) 52%),
    linear-gradient(180deg, rgba(6, 11, 18, 0.55) 0%, rgba(6, 11, 18, 0) 24%, rgba(6, 11, 18, 0) 72%, var(--paper) 100%);
}

.hero-bg-video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.95;
}

.hero-scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 11, 18, 0.5) 0%, rgba(6, 11, 18, 0) 26%, rgba(6, 11, 18, 0) 70%, rgba(6, 11, 18, 0.92) 100%);
}

.hero > .wrap {
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 620px);
  gap: 0;
}

.hero-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--ink-3);
}

.hero-kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--signal);
}

.hero h1 {
  margin: 22px 0 0;
  font-family: var(--serif);
  font-size: clamp(40px, 4.6vw, 62px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: 0.01em;
}

.hero-lede {
  margin-top: 24px;
  max-width: 30em;
  font-size: clamp(16.5px, 1.4vw, 18.5px);
  line-height: 1.8;
  color: var(--ink-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.hero-note {
  margin-top: 16px;
  font-size: 13.5px;
  color: var(--ink-3);
}

.hero-clients {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  margin-top: 40px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--ink-2);
}

.hero-clients span {
  color: var(--ink-3);
  letter-spacing: 0.16em;
}

.hero-motion {
  position: absolute;
  right: clamp(18px, 4vw, 48px);
  bottom: clamp(18px, 3vw, 32px);
  z-index: 3;
  margin-top: 16px;
  padding: 7px 14px;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-2);
  font: inherit;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  cursor: pointer;
}

.hero-motion:hover {
  color: var(--ink);
  border-color: var(--ink);
}

/* ---------- 首屏证据面板 ---------- */

.proof {
  background: rgba(8, 14, 22, 0.84);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(12px);
  padding: 20px 20px 16px;
}

.proof-head h2 {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.4;
}

.proof-head p {
  margin-top: 4px;
  font-size: 14px;
  color: var(--ink-2);
}

.tabs {
  display: none;
  gap: 6px;
  margin: 18px -20px 0;
  padding: 0 20px 12px;
  border-bottom: 1px solid var(--rule);
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.js .tabs {
  display: flex;
}

.tab {
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex: none;
  padding: 6px 12px 7px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  color: var(--ink-2);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.tab:hover {
  color: var(--ink);
}

.tab[aria-selected="true"] {
  color: var(--ink);
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.08);
}

.tab-q {
  font-size: 14.5px;
  font-weight: 600;
  white-space: nowrap;
}

.tab-k {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-3);
}

.proof-body {
  margin-top: 16px;
}

.proof-panel {
  margin: 0;
}

.proof-panel + .proof-panel {
  margin-top: 18px;
}

.js .proof-panel:not(.is-active) {
  display: none;
}

/* 无 JS 时：面板全部展开，tab 行隐藏，标题留在面板上方 */
.no-js .proof-panel {
  margin-top: 22px;
}

.shot {
  position: relative;
  border: 1px solid var(--rule);
  background: var(--white);
  overflow: hidden;
}

.shot img {
  width: 100%;
  height: auto;
}

.seal {
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding: 4px 9px 3px;
  border: 1.5px solid var(--signal);
  color: var(--signal);
  background: rgba(6, 11, 18, 0.86);
  font-family: var(--serif);
  font-size: 12px;
  letter-spacing: 0.18em;
  transform: rotate(-5deg);
  opacity: 0.92;
  pointer-events: none;
}

.zoom {
  display: inline-block;
  margin-left: 10px;
  font-size: 12.5px;
  color: var(--ink-3);
  text-decoration: none;
  border-bottom: 1px solid var(--rule-strong);
}

.zoom:hover {
  color: var(--signal);
  border-bottom-color: currentColor;
}

.proof-panel figcaption {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ink-2);
  padding-left: 12px;
  border-left: 2px solid var(--signal);
}

.proof-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
  font-size: 13.5px;
}

.proof-foot a {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.proof-foot .muted {
  color: var(--ink-3);
}



/* ---------- 首屏：搜索入口演示 ---------- */

.hero-demo {
  position: relative;
  top: -15px;
  max-width: 560px;
  margin-bottom: 15px;
  padding: 14px 16px 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
  background: rgba(8, 14, 22, 0.62);
  backdrop-filter: blur(10px);
}

.demo-tag {
  margin-left: auto;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--ink-3);
}

.demo-sources {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
}

.demo-source {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 6px;
  font-size: 12.5px;
  color: var(--ink-3);
  opacity: 0.55;
  transition: opacity 0.35s ease;
}

.demo-source.is-active {
  opacity: 1;
  color: var(--ink);
}

.demo-source.is-active::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  border-radius: 2px;
  background: #6aa9ff;
  box-shadow: 0 0 10px rgba(106, 169, 255, 0.7);
}

.demo-source img {
  width: 24px;
  height: 24px;
  object-fit: contain;
  border-radius: 4px;
}

.demo-input {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  margin-top: 12px;
  padding: 0 14px;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  background: rgba(6, 11, 18, 0.72);
  color: var(--ink-3);
}

.demo-placeholder {
  font-size: 13px;
  letter-spacing: 0.02em;
}

.demo-caret {
  width: 1px;
  height: 15px;
  background: var(--signal);
  animation: demo-blink 1.1s steps(1) infinite;
}

.demo-results {
  display: grid;
  gap: 5px;
  margin-top: 10px;
}

.demo-row {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 22px;
  padding: 0 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.035);
}

.demo-row .bar {
  display: block;
  height: 5px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
}

.demo-row-hit {
  background: rgba(224, 82, 63, 0.13);
  box-shadow: inset 0 0 0 1px rgba(224, 82, 63, 0.45);
  color: var(--ink);
  font-size: 12px;
}

.demo-row-hit .dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--signal);
}

.demo-row-hit em {
  margin-left: auto;
  font-style: normal;
  font-size: 10.5px;
  color: var(--ink-3);
}

.hero-demo.is-animating .demo-row {
  opacity: 0;
  transform: translateY(3px);
}

.hero-demo.is-animating .demo-row.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

@keyframes demo-blink {
  50% {
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .demo-caret {
    animation: none;
  }
}

/* ---------- 证据区（原首屏面板） ---------- */

.proof-section {
  border-bottom: 1px solid var(--rule);
}

.proof-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.proof-intro .display {
  margin-top: 16px;
}

.proof-hint {
  margin-top: 20px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-3);
}

.proof-section .proof {
  width: 100%;
}


/* ---------- 算账：投广告 vs 搜索增长 ---------- */

.math {
  border-bottom: 1px solid var(--rule);
}

.math-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  margin-top: clamp(40px, 5vw, 64px);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.math-intro .display {
  margin-top: 16px;
}

.math .math-cost-title {
  font-size: clamp(26px, 2.8vw, 34px);
  line-height: 1.3;
  color: #6aa9ff;
}

.math-statement {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
}

.math-statement .display {
  margin: 0;
}

.math-statement-text {
  max-width: 780px;
  margin: 18px auto 0;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.9;
  color: var(--ink-2);
}

.math-statement-text strong {
  color: var(--ink);
  font-weight: 600;
}

.math-proof {
  max-width: 820px;
  margin: 30px auto 0;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
  text-align: center;
}

.math-proof-label {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.math-proof-text {
  margin-top: 10px;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.85;
  color: var(--ink-2);
}

.math-proof-text strong {
  font-family: var(--serif);
  font-size: 1.35em;
  font-weight: 700;
  color: var(--ink);
}

.math-proof-note {
  display: inline-block;
  margin-top: 10px;
  padding: 4px 12px;
  border-left: 2px solid rgba(224, 82, 63, 0.7);
  border-radius: 3px;
  font-size: 15px;
  line-height: 1.8;
  color: #f6d2c6;
  background: rgba(224, 82, 63, 0.16);
}

.math-proof-text .nowrap {
  white-space: nowrap;
}

.math-hint {
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-3);
}

.math-cta {
  margin-top: 24px;
}

.math-promise {
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}

.math-promise a {
  color: var(--teal);
  border-bottom: 1px solid rgba(127, 182, 216, 0.4);
  text-decoration: none;
}

.math-promise a:hover {
  color: #a9d2ea;
  border-bottom-color: currentColor;
}

.math-panel {
  padding: 22px 22px 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(8, 14, 22, 0.84);
  backdrop-filter: blur(12px);
}

.math-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.math-panel-title {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.math-tag {
  padding: 3px 9px;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  white-space: nowrap;
}

.math-table-wrap {
  overflow-x: auto;
}

.math-table {
  width: 100%;
  border-collapse: collapse;
}

.math-table thead th {
  padding: 0 10px 10px 0;
  border-bottom: 1px solid var(--rule-strong);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-align: left;
  color: var(--ink-3);
  white-space: nowrap;
}

.math-table thead th:last-child {
  padding-right: 0;
  padding-left: 12px;
  color: var(--teal);
}

.math-table tbody th {
  width: 23%;
  padding: 11px 10px 11px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 12.5px;
  font-weight: 400;
  text-align: left;
  color: var(--ink-3);
  white-space: nowrap;
}

.math-table tbody td {
  padding: 11px 10px;
  border-bottom: 1px solid var(--rule);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-2);
  vertical-align: top;
}

.math-table tbody td:last-child {
  padding-right: 0;
  padding-left: 12px;
  color: var(--ink);
  background: rgba(127, 182, 216, 0.06);
}

.math-table tbody tr:last-child th,
.math-table tbody tr:last-child td {
  border-bottom: 0;
}

.math-calc {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--rule-strong);
}

.math-calc-title {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-3);
}

.math-calc ul {
  display: grid;
  gap: 6px;
  margin-top: 10px;
}

.math-calc li {
  display: flex;
  gap: 10px;
  font-size: 13.5px;
  color: var(--ink-2);
}

.math-calc li span {
  flex: 0 0 52px;
  font-size: 12px;
  color: var(--ink-3);
}

.math-calc-note {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-3);
}

@media (max-width: 900px) {
  .math-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .math-panel {
    padding: 18px 16px 16px;
  }
}


/* ---------- 内容：四关 ---------- */

.content-gates {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(28px, 3.5vw, 40px);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.content-gate {
  padding: 18px 18px 20px 0;
}

.content-gate + .content-gate {
  padding-left: 18px;
  border-left: 1px solid var(--rule);
}

.content-gate-k {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.content-gate h3 {
  margin-top: 8px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.content-gate p {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-2);
}

.content-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: clamp(28px, 3.5vw, 40px);
  border: 1px solid var(--rule);
}

.content-compare-col {
  padding: 18px 20px;
}

.content-compare-col + .content-compare-col {
  border-left: 1px solid var(--rule);
}

.content-before {
  background: rgba(0, 0, 0, 0.18);
}

.content-before p:last-child {
  color: var(--ink-3);
}

.content-after {
  background: rgba(127, 182, 216, 0.06);
  box-shadow: inset 3px 0 0 var(--teal);
}

.content-after p:last-child {
  color: var(--ink);
}

.content-compare-k {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.content-after .content-compare-k {
  color: var(--teal);
}

.content-compare-col p:last-child {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.8;
}

.content-footer {
  display: grid;
  gap: 8px;
  margin-top: 22px;
}

.content-footer p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-3);
}

@media (max-width: 900px) {
  .content-gates {
    grid-template-columns: minmax(0, 1fr);
  }

  .content-gate,
  .content-gate + .content-gate {
    padding: 16px 0;
    border-left: 0;
  }

  .content-gate + .content-gate {
    border-top: 1px solid var(--rule);
  }

  .content-compare {
    grid-template-columns: minmax(0, 1fr);
  }

  .content-compare-col + .content-compare-col {
    border-left: 0;
    border-top: 1px solid var(--rule);
  }
}


/* ---------- 官网：对照与壁垒 ---------- */

.h2-logo {
  display: inline-block;
  width: auto;
  height: 1.08em;
  margin-right: 0.24em;
  vertical-align: -0.1em;
}

.site-build .section-head {
  max-width: 900px;
}

.site-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(24px, 3.5vw, 48px);
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}

.site-slogan {
  font-size: 17px;
  line-height: 1.8;
  font-weight: 500;
  color: var(--ink);
}

.site-slogan .nowrap {
  white-space: nowrap;
}

.site-lede {
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-2);
}

@media (max-width: 760px) {
  .media-section .display {
    font-size: clamp(23px, 6.7vw, 30px);
  }

  .site-build .display,
  .content-service .display {
    font-size: clamp(23px, 6.7vw, 30px);
  }

  .site-intro {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }
}

.site-compare {
  margin-top: clamp(28px, 3.5vw, 40px);
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

.site-compare-title {
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.site-moat {
  max-width: 920px;
  margin-top: 24px;
  padding: 14px 18px;
  border-left: 2px solid var(--signal);
  background: rgba(224, 82, 63, 0.06);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
}

.site-moat strong {
  color: var(--ink);
  font-weight: 600;
}

.site-deliver {
  max-width: 920px;
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.85;
  color: var(--ink-3);
}

.site-deliver a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 182, 216, 0.4);
}

.site-deliver a:hover {
  color: #a9d2ea;
  border-bottom-color: currentColor;
}


/* ---------- 内容服务：分析框架 ---------- */

.content-service .section-head {
  max-width: 900px;
}

.cs-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
}

.cs-toc a {
  padding: 4px 11px;
  border-radius: 999px;
  background: #6aa9ff;
  color: #061018;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.cs-toc a:hover {
  background: #a8c9ff;
  color: #061018;
}

.cs-risk {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}

.cs-risk-k {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--signal);
}

.cs-risk-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 14px;
}

.cs-risk-grid > div {
  padding-right: 20px;
}

.cs-risk-grid > div + div {
  padding-left: 20px;
  border-left: 1px solid var(--rule);
}

.cs-risk-grid span {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-3);
}

.cs-risk-grid p {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-2);
}

.cs-risk-stat {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-2);
}

.cs-risk-stat strong {
  color: var(--ink);
  font-weight: 600;
}

.cs-risk-asset {
  margin-top: 14px;
  padding: 10px 14px;
  border-left: 2px solid var(--signal);
  background: rgba(224, 82, 63, 0.06);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

.cs-risk-asset strong {
  color: var(--ink);
  font-weight: 600;
}

.cs-risk-src {
  margin-top: 8px;
  font-size: 11.5px;
  line-height: 1.8;
  color: var(--ink-3);
}

.cs-risk-src a {
  color: var(--ink-3);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.cs-risk-src a:hover {
  color: var(--ink);
  border-bottom-color: currentColor;
}

@media (max-width: 900px) {
  .cs-risk-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .cs-risk-grid > div,
  .cs-risk-grid > div + div {
    padding: 12px 0;
    border-left: 0;
  }

  .cs-risk-grid > div + div {
    border-top: 1px solid var(--rule);
  }
}

.section-kicker.cs-num {
  display: inline-flex;
  align-items: center;
  padding: 4px 11px;
  border-radius: 999px;
  background: #6aa9ff;
  color: #061018;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.section-kicker.cs-num::before {
  display: none;
}

.cs-subhead {
  margin-top: clamp(44px, 5.5vw, 64px);
}

.cs-subhead h3 {
  margin-top: 10px;
  font-family: var(--serif);
  font-size: clamp(26px, 2.6vw, 34px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

.cs-subhead + .cs-layers,
.cs-subhead + .cs-fact-copy {
  margin-top: 18px;
}

.cs-subhead,
.cs-produce,
.cs-video {
  scroll-margin-top: 96px;
}

.cs-layers {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: clamp(28px, 3.5vw, 40px);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.cs-layer {
  padding: 18px 22px 20px 0;
}

.cs-layer + .cs-layer {
  padding-left: 22px;
  border-left: 1px solid var(--rule);
}

.cs-layer-k {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.cs-layer h3 {
  margin-top: 8px;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.cs-layer p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-2);
}

.cs-layer .cs-layer-out {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--ink-3);
}

.cs-fact-copy {
  max-width: 760px;
  margin-top: 18px;
}

.cs-fact-title {
  font-family: var(--serif);
  font-size: clamp(20px, 2vw, 24px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.cs-fact-copy p {
  max-width: 36em;
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

.algo {
  margin-top: 0;
  padding: 22px 0 24px;
  border-bottom: 1px solid var(--rule-strong);
}

.algo-k {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--teal);
}

.algo-head h4 {
  margin-top: 8px;
  font-family: var(--serif);
  font-size: clamp(20px, 2vw, 24px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.algo-lede {
  max-width: 40em;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-2);
}

.algo-lede + .algo-body {
  margin-top: 14px;
}

.algo-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.6fr) minmax(0, 1.4fr);
  gap: clamp(28px, 4vw, 56px);
  margin-top: 20px;
  align-items: stretch;
}

.algo-body p {
  max-width: 40em;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-2);
}

.algo-body strong {
  color: var(--ink);
  font-weight: 600;
}

.algo-body .algo-note {
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--ink-3);
}

.algo-result {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 16px 20px;
  border-left: 2px solid var(--teal);
  background: rgba(127, 182, 216, 0.07);
}

.algo-result-k {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--teal);
}

.algo-result-num {
  margin-top: 8px;
  font-family: var(--serif);
  font-size: clamp(34px, 3.4vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: #a9d2ea;
}

.algo-result-num em {
  margin-left: 3px;
  font-style: normal;
  font-size: 0.4em;
  color: var(--ink-3);
}

.algo-result-num-sm {
  margin-top: 18px;
  font-size: clamp(24px, 2.4vw, 30px);
}

.algo-result-label {
  margin-top: 6px;
  font-size: 12px;
  color: var(--ink-2);
}

@media (max-width: 900px) {
  .algo-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .algo-left {
    order: 1;
  }

  .algo-result {
    order: 2;
    padding: 16px 18px;
    border-left: 2px solid var(--teal);
  }
}

.algo {
  margin-top: 0;
  padding: 22px 0 24px;
  border-bottom: 1px solid var(--rule-strong);
}

.algo-k {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--teal);
}

.algo-head h4 {
  margin-top: 8px;
  font-family: var(--serif);
  font-size: clamp(20px, 2vw, 24px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.algo-lede {
  max-width: 40em;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-2);
}

.algo-lede + .algo-body {
  margin-top: 14px;
}

.algo-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.6fr) minmax(0, 1.4fr);
  gap: clamp(28px, 4vw, 56px);
  margin-top: 20px;
  align-items: stretch;
}

.algo-list {
  display: grid;
  gap: 10px;
}

.algo-list li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 14px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-2);
}

.algo-list span {
  padding-top: 2px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--ink-3);
}

.algo-result {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 16px 20px;
  border-left: 2px solid var(--teal);
  background: rgba(127, 182, 216, 0.07);
}

.algo-result-k {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--teal);
}

.algo-result-num {
  margin-top: 8px;
  font-family: var(--serif);
  font-size: clamp(34px, 3.4vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: #a9d2ea;
}

.algo-result-num em {
  margin-left: 3px;
  font-style: normal;
  font-size: 0.4em;
  color: var(--ink-3);
}

.algo-result-num-sm {
  margin-top: 18px;
  font-size: clamp(24px, 2.4vw, 30px);
}

.algo-result-label {
  margin-top: 6px;
  font-size: 12px;
  color: var(--ink-2);
}

@media (max-width: 900px) {
  .algo-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .algo-left {
    order: 1;
  }

  .algo-result {
    order: 2;
    padding: 16px 18px;
    border-left: 2px solid var(--teal);
  }
}

.cs-produce,
.cs-video {
  margin-top: clamp(48px, 6vw, 72px);
  padding-top: clamp(32px, 4vw, 44px);
  border-top: 1px solid var(--rule-strong);
}

.cs-produce .display,
.cs-video .display {
  font-size: clamp(26px, 2.6vw, 34px);
  line-height: 1.3;
}

.cs-video-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(28px, 4vw, 56px);
  margin-top: clamp(28px, 3.5vw, 40px);
  align-items: start;
}

.cs-axis-title {
  margin-top: clamp(28px, 3.5vw, 40px);
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.cs-axis {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 14px;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.cs-axis-step {
  padding: 16px 20px 18px 0;
}

.cs-axis-step + .cs-axis-step {
  padding-left: 20px;
  border-left: 1px solid var(--rule);
}

.cs-axis-step span {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.cs-axis-step h3 {
  margin-top: 6px;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.cs-axis-step p {
  margin-top: 6px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-2);
}

.cs-cross {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

.cs-cross strong {
  color: var(--ink);
}

.cs-table {
  margin-top: clamp(24px, 3vw, 32px);
}

@media (max-width: 900px) {
  .cs-layers {
    grid-template-columns: minmax(0, 1fr);
  }

  .cs-layer,
  .cs-layer + .cs-layer {
    padding: 16px 0;
    border-left: 0;
  }

  .cs-layer + .cs-layer {
    border-top: 1px solid var(--rule);
  }

  .cs-video-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .cs-axis {
    grid-template-columns: minmax(0, 1fr);
  }

  .cs-axis-step,
  .cs-axis-step + .cs-axis-step {
    padding: 14px 0;
    border-left: 0;
  }

  .cs-axis-step + .cs-axis-step {
    border-top: 1px solid var(--rule);
  }
}

/* ---------- 数字带 ---------- */

.stats {
  background: var(--paper-2);
  border-bottom: 1px solid var(--rule);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.stat {
  padding: clamp(26px, 3.4vw, 40px) clamp(16px, 2.6vw, 30px);
  border-left: 1px solid var(--rule);
}

.stat:first-child {
  border-left: 0;
  padding-left: 0;
}

.stat-num {
  display: block;
  font-family: var(--serif);
  font-size: clamp(38px, 4vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}

.stat-num em {
  font-style: normal;
  font-size: 0.5em;
  letter-spacing: 0;
  margin-left: 2px;
}

.stat-label {
  display: block;
  margin-top: 12px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-2);
}

/* ---------- 通用区块 ---------- */

.section {
  padding: clamp(56px, 7.5vw, 104px) 0;
}

.section-tint {
  background: var(--paper-2);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.display {
  font-family: var(--serif);
  font-size: clamp(30px, 3.9vw, 48px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: 0.005em;
}

.section-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--ink-3);
}

.section-kicker::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--rule-strong);
}

.section-head {
  max-width: 780px;
}

.section-head .display {
  margin-top: 16px;
}

.section-lede {
  margin-top: 18px;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 问题 ---------- */

.problem-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 clamp(32px, 4vw, 64px);
  margin-top: clamp(36px, 4.5vw, 56px);
  border-top: 1px solid var(--rule-strong);
}

.problem-item {
  display: flex;
  gap: 18px;
  padding: 28px 0 30px;
  border-bottom: 1px solid var(--rule);
}

.problem-no {
  flex: none;
  width: 18px;
  padding-top: 2px;
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.6;
  color: var(--signal);
}

.problem-item h3 {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.45;
}

.problem-item p {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

/* ---------- 变化 ---------- */

.shift-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(32px, 5vw, 72px);
}

.shift-facts {
  border-top: 1px solid var(--rule-strong);
}

.fact {
  padding: 24px 0 26px;
  border-bottom: 1px solid var(--rule);
}

.fact-num {
  font-family: var(--serif);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}

.fact-num em {
  font-style: normal;
  font-size: 0.45em;
  margin-left: 2px;
}

.fact-text {
  margin-top: 10px;
  font-size: 16px;
  line-height: 1.75;
}

.fact-src {
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--ink-3);
}

/* ---------- 方法 ---------- */

.steps {
  margin-top: clamp(36px, 4.5vw, 56px);
  border-top: 1px solid var(--rule-strong);
}

.step {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: clamp(18px, 3vw, 40px);
  padding: 30px 0 32px;
  border-bottom: 1px solid var(--rule);
}

.step-meta {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.step-no {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}

.step-time {
  font-size: 13px;
  color: var(--ink-3);
  white-space: nowrap;
}

.step-body h3 {
  font-family: var(--serif);
  font-size: 23px;
  font-weight: 700;
  line-height: 1.45;
}

.step-body > p {
  margin-top: 10px;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

.step-deliver {
  margin-top: 14px;
  padding: 10px 14px;
  background: var(--paper);
  border-left: 2px solid var(--rule-strong);
  font-size: 14px;
  color: var(--ink-2);
}

.step-deliver span {
  display: inline-block;
  margin-right: 8px;
  color: var(--ink);
  font-weight: 600;
}

.caliber {
  margin-top: 22px;
  padding: 16px 18px;
  border: 1px solid var(--rule-strong);
  background: var(--paper-2);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-2);
}

.caliber strong {
  color: var(--ink);
}

/* ---------- 案例 ---------- */

.case {
  background: var(--dark);
  color: var(--dark-ink);
  border-top: 1px solid var(--dark);
}

.case .section-kicker {
  color: var(--dark-ink-2);
}

.case .section-kicker::before {
  background: #4a4f57;
}

.case .display {
  color: #f4f1ea;
}

.case-head {
  max-width: 860px;
}

.case-head .display {
  margin-top: 16px;
}

.case-lede {
  margin-top: 20px;
  max-width: 38em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--dark-ink-2);
}

.case-brand {
  margin-left: 0.6em;
  font-family: inherit;
  color: #6aa9ff;
  letter-spacing: inherit;
}

.case-intro {
  margin-top: 22px;
  max-width: 860px;
  padding: 14px 18px;
  border-left: 3px solid var(--signal);
  background: rgba(255, 255, 255, 0.04);
  font-size: clamp(16.5px, 1.5vw, 19px);
  line-height: 1.8;
  color: var(--dark-ink);
}

.case-intro strong {
  color: #f0b9a8;
  font-weight: 600;
}

.case-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  margin-top: clamp(36px, 4.5vw, 56px);
  align-items: stretch;
}

.case-shot {
  display: flex;
  flex-direction: column;
  margin: 0;
}

.case-shot-link {
  position: relative;
  display: block;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  border: 1px solid var(--dark-rule);
  background: #000;
}

.case-shot-link img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  border: 0;
}

.case-shot-hint {
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding: 4px 10px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 999px;
  background: rgba(3, 6, 10, 0.72);
  color: #f4f1ea;
  font-size: 11.5px;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.case-shot-link:hover .case-shot-hint,
.case-shot-link:focus-visible .case-shot-hint {
  opacity: 1;
  transform: none;
}

.case-shot-link:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
}

@media (max-width: 900px) {
  .case-shot-link {
    flex: none;
    aspect-ratio: 1577 / 1071;
  }
}

.case-shot figcaption {
  margin-top: 12px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--dark-ink-2);
}

.case-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  align-self: start;
  border-top: 1px solid var(--dark-rule);
}

.case-fact {
  padding: 18px 18px 20px 0;
  border-bottom: 1px solid var(--dark-rule);
}

.case-fact:nth-child(even) {
  padding-left: 18px;
  border-left: 1px solid var(--dark-rule);
}

.case-fact-num {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  color: #f4f1ea;
}

.case-fact p + p {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--dark-ink-2);
}

.case-bottom {
  margin-top: clamp(32px, 4vw, 48px);
  padding-top: clamp(26px, 3vw, 36px);
  border-top: 1px solid var(--dark-rule);
}

.case-quote {
  margin: 0;
}

.case-quote p {
  font-family: var(--serif);
  font-size: clamp(20px, 2.1vw, 25px);
  line-height: 1.6;
  color: #f4f1ea;
}

.case-quote strong {
  color: #f0b9a8;
}

.case-quote footer {
  margin-top: 12px;
  font-size: 14px;
  color: var(--dark-ink-2);
}

.case-note {
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--dark-ink-2);
  align-self: end;
}

/* ---------- 服务表 ---------- */

.table-wrap {
  margin-top: clamp(32px, 4vw, 48px);
  overflow-x: auto;
}

.services-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.services-table th,
.services-table td {
  padding: 20px 18px;
  vertical-align: top;
  border-bottom: 1px solid var(--rule);
  font-size: 15px;
  line-height: 1.7;
}

.services-table thead th {
  padding-top: 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule-strong);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  white-space: nowrap;
}

.services-table tbody th {
  width: 22%;
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.services-table tbody td:nth-child(4) {
  white-space: nowrap;
  color: var(--ink-2);
}

.table-note {
  margin-top: 18px;
  font-size: 14px;
  color: var(--ink-2);
}

/* ---------- 媒体 ---------- */

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(28px, 3.5vw, 40px);
}

.chips li {
  padding: 6px 12px;
  border: 1px solid var(--rule);
  background: var(--paper);
  font-size: 14px;
  color: var(--ink-2);
}

.media-proof {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(26px, 4vw, 56px);
  margin-top: clamp(32px, 4vw, 48px);
  padding-top: 26px;
  border-top: 1px solid var(--rule-strong);
}

.media-proof-head h3 {
  font-family: var(--serif);
  font-size: 23px;
  font-weight: 700;
  line-height: 1.45;
}

.media-proof-head p {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.media-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 28px;
  align-self: start;
}

.media-links a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 15px;
  color: var(--ink);
  text-decoration: none;
}

.media-links a:hover {
  color: var(--signal);
}

.media-links a span {
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.08em;
}

.media-proof .small {
  grid-column: 1 / -1;
  margin-top: 12px;
}

.media-shot {
  max-width: 820px;
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.media-shot figcaption {
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--signal);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ink-2);
}

/* ---------- 为什么 ---------- */

.why-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(32px, 5vw, 72px);
}

.why-head .display {
  margin-top: 16px;
}

.why-list {
  border-top: 1px solid var(--rule-strong);
}

.why-list li {
  padding: 22px 0 24px;
  border-bottom: 1px solid var(--rule);
}

.why-list h3 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.45;
}

.why-list p {
  margin-top: 6px;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

/* ---------- FAQ ---------- */

.faq-wrap {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.25fr);
  gap: clamp(32px, 5vw, 72px);
}

.faq-head .display {
  margin-top: 16px;
}

.faq-list {
  border-top: 1px solid var(--rule-strong);
}

.faq-list details {
  border-bottom: 1px solid var(--rule);
}

.faq-list summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 19px 0;
  font-size: 16.5px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  flex: none;
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1;
  color: var(--signal);
  transition: transform 160ms ease;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  padding: 0 0 20px;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 联系 ---------- */

.contact {
  border-top: 1px solid var(--rule-strong);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(32px, 5vw, 72px);
}

.contact-copy .display {
  margin-top: 16px;
}

.contact-points {
  margin-top: 24px;
}

.contact-points li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-size: 15px;
  color: var(--ink-2);
}

.contact-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background: var(--signal);
}

.contact-direct {
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
}

.contact-direct p {
  display: flex;
  gap: 14px;
  margin-bottom: 8px;
  font-size: 15px;
}

.contact-label {
  width: 52px;
  flex: none;
  color: var(--ink-3);
  font-size: 13px;
  letter-spacing: 0.12em;
  padding-top: 2px;
}

.fill-in {
  border-bottom: 1px dashed var(--rule-strong);
  color: var(--ink-2);
  cursor: help;
}

.diagnose-form {
  background: var(--paper-2);
  border: 1px solid var(--rule-strong);
  padding: clamp(22px, 3vw, 34px);
}

.field {
  margin-bottom: 18px;
}

.field label {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 7px;
  font-size: 14px;
  font-weight: 600;
}

.req {
  font-size: 11.5px;
  font-weight: 400;
  color: var(--signal);
  letter-spacing: 0.06em;
}

.field input,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--rule-strong);
  border-radius: 14px;
  background: var(--white);
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  line-height: 1.5;
}

.field input:focus-visible,
.field textarea:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 1px;
  border-color: var(--signal);
}

.field input[aria-invalid="true"],
.field textarea[aria-invalid="true"] {
  border-color: var(--signal);
  background: #2a1210;
}

.field-hint,
.form-hint {
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-3);
}

.field-error {
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--signal);
}

.diagnose-form .btn-block {
  margin-top: 6px;
}

.form-result:focus {
  outline: none;
}

.form-result {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--rule-strong);
}

.form-result h3 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
}

.result-text {
  margin: 12px 0 0;
  padding: 14px;
  background: var(--paper);
  border: 1px solid var(--rule);
  font-family: inherit;
  font-size: 14px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

/* ---------- 页脚 ---------- */

.site-footer {
  background: var(--paper-2);
  border-top: 1px solid var(--rule-strong);
  padding: 44px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.9fr) minmax(0, 0.8fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.brand-footer {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark-footer {
  width: 24px;
  height: 24px;
}

.footer-line {
  margin-top: 12px;
  max-width: 26em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, auto));
  justify-content: start;
  gap: 10px 26px;
  font-size: 14px;
}

.footer-nav a {
  color: var(--ink-2);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--ink);
}

.footer-meta {
  font-size: 13.5px;
  color: var(--ink-2);
}

.footer-meta p + p {
  margin-top: 6px;
}

/* ---------- 动效 ---------- */

@media (prefers-reduced-motion: no-preference) {
  .hero-copy > * {
    animation: rise 620ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
  }

  .hero-copy > *:nth-child(2) { animation-delay: 60ms; }
  .hero-copy > *:nth-child(3) { animation-delay: 120ms; }
  .hero-copy > *:nth-child(4) { animation-delay: 180ms; }
  .hero-copy > *:nth-child(5) { animation-delay: 240ms; }

  .proof {
    animation: rise 700ms cubic-bezier(0.2, 0.7, 0.2, 1) 140ms both;
  }

  .proof-panel.is-active {
    animation: fade 260ms ease both;
  }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

@keyframes fade {
  from { opacity: 0; }
  to { opacity: 1; }
}


/* ---------- 10 倍承诺 ---------- */

.promise {
  border-top: 1px solid var(--rule);
}

.promise-head {
  max-width: 820px;
}

.promise-head .display {
  margin-top: 16px;
}

.promise-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 4vw, 56px);
  margin-top: clamp(34px, 4.5vw, 52px);
  align-items: start;
}

.promise-formula {
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--rule-strong);
  background: var(--paper-2);
}

.formula-label {
  font-size: 12.5px;
  letter-spacing: 0.18em;
  color: var(--ink-3);
}

.formula {
  margin-top: 18px;
  font-family: var(--serif);
  font-size: clamp(40px, 4.6vw, 62px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.formula span {
  color: var(--signal);
}

.formula-def {
  margin-top: 24px;
  border-top: 1px solid var(--rule);
}

.formula-def > div {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
}

.formula-def dt {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--signal);
}

.formula-def dd {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}

.promise-terms h3 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
}

.term-list {
  margin-top: 8px;
  border-top: 1px solid var(--rule-strong);
}

.term-list li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0 13px;
  border-bottom: 1px solid var(--rule);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-2);
}

.term-list li span {
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  padding-top: 2px;
}

.promise-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px 32px;
  margin-top: clamp(26px, 3.5vw, 40px);
  padding-top: 24px;
  border-top: 1px solid var(--rule-strong);
}

.promise-foot p {
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

.promise-foot strong {
  color: var(--ink);
}

.promise-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 案例：百度搜索 / 官网链接 ---------- */

.case-links {
  margin-top: clamp(26px, 3.5vw, 38px);
  padding-top: 22px;
  border-top: 1px solid var(--dark-rule);
}

.case-links-label {
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--dark-ink-2);
}

.case-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 12px;
}

.case-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(106, 169, 255, 0.45);
  color: #6aa9ff;
  font-size: 15px;
  text-decoration: none;
}

.case-links a:hover {
  color: #a8c9ff;
  border-bottom-color: currentColor;
}

.case-links a::after {
  content: "↗";
  font-size: 12px;
  opacity: 0.7;
}

.case-links-note {
  margin-top: 12px;
  max-width: 52em;
  font-size: 12px;
  line-height: 1.7;
  color: var(--dark-ink-2);
}

/* ---------- 创始人 ---------- */

.founder {
  background: var(--paper-2);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.founder-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.founder-photo {
  margin: 0;
  max-width: 360px;
}

.portrait {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border: 1px solid var(--rule-strong);
  background: var(--paper-2);
}

.portrait img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.founder-photo figcaption {
  margin-top: 16px;
  text-align: center;
}

.founder-name {
  display: block;
  font-family: var(--serif);
  font-size: clamp(28px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.founder-title {
  display: block;
  margin-top: 7px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-2);
}

.founder-body .display {
  margin-top: 16px;
}

.founder-role {
  margin-top: 16px;
  padding-left: 12px;
  border-left: 2px solid var(--signal);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--ink-2);
}

.founder-text {
  margin-top: 16px;
  max-width: 36em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.founder-text:first-of-type {
  color: var(--ink);
}

.founder-path {
  margin-top: 14px;
  border-top: 1px solid var(--rule-strong);
}

.founder-path li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 12px;
  padding: 9px 0 10px;
  border-bottom: 1px solid var(--rule);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-2);
}

.founder-path span {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  padding-top: 2px;
}

.founder-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 28px;
  border-top: 1px solid var(--rule-strong);
}

.founder-facts > div {
  padding: 16px 16px 18px 0;
  border-bottom: 1px solid var(--rule);
}

.founder-facts > div + div {
  padding-left: 18px;
  border-left: 1px solid var(--rule);
}

.founder-facts dt {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.founder-facts dd {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-2);
}

.founder-quote {
  margin-top: 28px;
  padding-left: 18px;
  border-left: 3px solid var(--signal);
}

.founder-quote p {
  font-family: var(--serif);
  font-size: clamp(19px, 2vw, 23px);
  line-height: 1.6;
  color: var(--ink);
}

.founder-note {
  margin-top: 20px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-3);
}

/* ---------- 媒体 LOGO 墙 ---------- */

.media-values {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: clamp(28px, 3.5vw, 40px);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.media-value {
  padding: 18px 22px 20px 0;
}

.media-value + .media-value {
  padding-left: 22px;
  border-left: 1px solid var(--rule);
}

.media-value-k {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.media-value h3 {
  margin-top: 8px;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.media-value p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-2);
}

.media-flow {
  margin-top: 16px;
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.8;
  color: var(--ink-3);
}

@media (max-width: 900px) {
  .media-values {
    grid-template-columns: minmax(0, 1fr);
  }

  .media-value,
  .media-value + .media-value {
    padding: 16px 0;
    border-left: 0;
  }

  .media-value + .media-value {
    border-top: 1px solid var(--rule);
  }
}

.media-boundary {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

.media-label {
  margin-top: clamp(28px, 3.5vw, 40px);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.media-label + .media-logos {
  margin-top: 12px;
}

.media-logos {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 3.5vw, 40px);
  border: 1px solid var(--rule);
  background: var(--rule);
}

.media-logos li {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 64px;
  padding: 12px 14px;
  background: var(--paper);
}

.media-logos img {
  flex: none;
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.media-logos span {
  font-size: 13.5px;
  line-height: 1.3;
  color: var(--ink-2);
}



/* ---------- 案例：动态案例卡 ---------- */

.case-anim {
  margin-top: clamp(28px, 3.5vw, 40px);
  padding-top: 24px;
  border-top: 1px solid var(--dark-rule);
}

.case-anim-label {
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--dark-ink-2);
}

.case-anim-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 14px;
}

.case-anim-grid figure {
  margin: 0;
}

.anim-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
  border: 1px solid var(--dark-rule);
  overflow: hidden;
}

.anim-frame video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: pointer;
}

.anim-badge {
  position: absolute;
  right: 8px;
  bottom: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  background: rgba(3, 6, 10, 0.6);
  color: #f4f1ea;
  font-size: 11px;
  pointer-events: none;
}

.case-anim-grid figure.playing .anim-badge {
  display: none;
}

.case-anim-grid figcaption {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--dark-ink-2);
}

.case-anim-grid figcaption strong {
  font-size: 14px;
  font-weight: 600;
  color: var(--dark-ink);
}

.anim-toggle {
  align-self: flex-start;
  margin-top: 4px;
  padding: 4px 12px;
  border: 1px solid #3a4656;
  border-radius: 999px;
  background: transparent;
  color: var(--dark-ink-2);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.anim-toggle:hover {
  color: var(--dark-ink);
  border-color: var(--dark-ink);
}


/* ---------- 案例：主播放器 ---------- */

.case-player {
  margin-top: clamp(28px, 3.5vw, 40px);
  padding-top: 24px;
  border-top: 1px solid var(--dark-rule);
}

.case-stage {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--dark-rule);
  border-radius: 10px;
  background: #000;
}

.case-stage-bg {
  position: absolute;
  inset: -6%;
  z-index: 0;
  background-size: cover;
  background-position: center;
  filter: blur(26px) brightness(0.34);
  transform: scale(1.08);
}

.case-stage-video {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  cursor: pointer;
}

.case-stage-index {
  position: absolute;
  top: 12px;
  left: 14px;
  z-index: 2;
  padding: 4px 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  background: rgba(3, 6, 10, 0.6);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #e9eff6;
}

.case-stage-toggle {
  position: absolute;
  right: 12px;
  bottom: 12px;
  z-index: 2;
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 999px;
  background: rgba(3, 6, 10, 0.6);
  color: #f4f1ea;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.case-stage-toggle:hover {
  border-color: #f4f1ea;
}

.case-stage-badge {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  background: rgba(3, 6, 10, 0.55);
  color: #f4f1ea;
  font-size: 18px;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.case-stage:not(.is-paused) .case-stage-badge {
  display: none;
}

.case-stage-meta {
  margin-top: 14px;
}

.case-stage-title {
  margin-top: 6px;
  font-family: var(--serif);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--dark-ink);
}

.case-stage-desc {
  margin-top: 4px;
  font-size: 14px;
  color: var(--dark-ink-2);
}

.case-thumbs {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  padding-bottom: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.case-thumbs li {
  flex: 0 0 150px;
}

.case-thumb {
  display: block;
  width: 100%;
  padding: 0;
  border: 1px solid var(--dark-rule);
  border-radius: 8px;
  overflow: hidden;
  background: transparent;
  text-align: left;
  opacity: 0.55;
  cursor: pointer;
  transition: opacity 0.2s ease, border-color 0.2s ease;
}

.case-thumb img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.case-thumb span {
  display: block;
  padding: 6px 8px;
  font-size: 12px;
  color: var(--dark-ink-2);
}

.case-thumb.is-active {
  opacity: 1;
  border-color: rgba(224, 82, 63, 0.7);
}

.case-thumb:hover {
  opacity: 0.85;
}

/* ---------- 视频与动态内容 ---------- */

.video {
  background: var(--dark);
  color: var(--dark-ink);
  border-top: 1px solid var(--dark);
}

.video .section-kicker {
  color: var(--dark-ink-2);
}

.video .section-kicker::before {
  background: #4a4f57;
}

.video .display {
  color: #f4f1ea;
}

.video .section-lede {
  color: var(--dark-ink-2);
}

.video-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(32px, 4vw, 48px);
  align-items: start;
}

.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
  border: 1px solid var(--dark-rule);
  overflow: hidden;
}

.video-frame video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 4px 9px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: #f4f1ea;
  background: rgba(16, 18, 21, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.video-hero,
.video-mini {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px 16px;
  margin: 0;
}

.video-hero .video-frame,
.video-mini .video-frame {
  grid-column: 1 / -1;
}

.video-hero figcaption,
.video-mini figcaption {
  grid-column: 1;
}

.video-toggle {
  grid-column: 2;
  align-self: start;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid #3a3f46;
  border-radius: 999px;
  background: transparent;
  color: #f4f1ea;
  font: inherit;
  font-size: 12.5px;
  cursor: pointer;
}

.video-toggle:hover {
  border-color: #f4f1ea;
}

.video-hero figcaption,
.video-mini figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--dark-ink-2);
}

.video-cap-note {
  display: inline-block;
  margin-left: 8px;
  color: #8b8780;
}

.video-side {
  display: flex;
  flex-direction: column;
  gap: clamp(18px, 2.5vw, 26px);
}

.video-specs h3 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  color: #f4f1ea;
}

.video-specs ol {
  margin-top: 8px;
  border-top: 1px solid var(--dark-rule);
}

.video-specs li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--dark-rule);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--dark-ink-2);
}

.video-specs li span {
  color: #f4f1ea;
}

.video-note {
  margin-top: 22px;
  font-size: 12px;
  line-height: 1.7;
  color: #8b8780;
}

/* ---------- 响应式 ---------- */

@media (max-width: 1080px) {
  .site-nav {
    gap: 18px;
  }

  .brand-tag {
    display: none;
  }

  .proof-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .proof-intro {
    max-width: 34em;
  }

  .media-logos {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .case-anim-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-demo {
    padding: 12px 12px 10px;
    margin-bottom: 22px;
  }

  .demo-sources {
    gap: 6px 8px;
  }

  .demo-source {
    gap: 5px;
    font-size: 11.5px;
  }

  .demo-source img {
    width: 18px;
    height: 18px;
  }

  .hero-bg {
    left: 0;
  }

  .hero-bg::after {
    background:
      linear-gradient(90deg, rgba(6, 11, 18, 0.92) 0%, rgba(6, 11, 18, 0.72) 100%),
      linear-gradient(180deg, rgba(6, 11, 18, 0.75) 0%, rgba(6, 11, 18, 0.55) 45%, var(--paper) 100%);
  }

  .proof {
    max-width: none;
  }
}

@media (max-width: 900px) {
  .promise-grid,
  .founder-grid,
  .video-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .video-side {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .case-anim-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .founder-photo {
    max-width: none;
  }

  .founder-photo .portrait {
    max-width: 280px;
    margin-inline: auto;
  }

  .media-logos {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .shift-grid,
  .why-grid,
  .faq-wrap,
  .contact-grid,
  .case-grid,
  .case-bottom {
    grid-template-columns: minmax(0, 1fr);
  }

  .faq-head,
  .why-head,
  .shift-head {
    max-width: 34em;
  }

  .media-proof {
    grid-template-columns: minmax(0, 1fr);
  }

  .case-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }


  /* 表格转卡片 */
  .services-table,
  .services-table tbody,
  .services-table tr,
  .services-table th,
  .services-table td {
    display: block;
    width: auto;
  }

  .services-table thead {
    display: none;
  }

  .services-table tbody tr {
    padding: 18px 0;
    border-bottom: 1px solid var(--rule);
  }

  .services-table tbody th {
    width: auto;
    padding: 0 0 8px;
    border: 0;
    font-size: 20px;
  }

  .services-table tbody td {
    padding: 4px 0;
    border: 0;
    font-size: 14.5px;
  }

  .services-table tbody td::before {
    content: attr(data-label);
    display: inline-block;
    width: 4.5em;
    color: var(--ink-3);
    font-size: 12.5px;
  }

  .services-table tbody td:nth-child(4) {
    white-space: normal;
  }
}

@media (max-width: 760px) {
  body {
    font-size: 16px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--gap) 18px;
    background: var(--paper-2);
    border-bottom: 1px solid var(--rule-strong);
    box-shadow: 0 18px 30px rgba(0, 0, 0, 0.55);
  }

  .site-nav[data-open="true"] {
    display: flex;
  }

  .site-nav > a {
    padding: 13px 0;
    border-bottom: 1px solid var(--rule);
    font-size: 16px;
  }

  .nav-cta {
    margin: 14px 0 0;
  }

  .header-inner {
    min-height: 64px;
    position: relative;
  }

  .brand-tag {
    display: none;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stat {
    border-left: 0;
    border-top: 1px solid var(--rule);
    padding: 22px 0;
  }

  .stat:nth-child(even) {
    padding-left: 20px;
    border-left: 1px solid var(--rule);
  }

  .stat:first-child,
  .stat:nth-child(2) {
    border-top: 0;
  }

  .problem-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .step {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .step-meta {
    gap: 10px;
  }

  .step-no {
    font-size: 22px;
  }

  .media-links {
    grid-template-columns: minmax(0, 1fr);
  }

  .media-logos {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .term-list li {
    grid-template-columns: 62px minmax(0, 1fr);
    gap: 10px;
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-nav {
    order: 3;
  }

  .case-facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .case-fact,
  .case-fact:nth-child(even) {
    padding: 16px 0;
    border-left: 0;
  }
}

@media (max-width: 520px) {
  .hero h1 {
    font-size: clamp(32px, 9.6vw, 42px);
  }

  .hero-actions .btn {
    width: 100%;
  }

  .proof {
    padding: 16px 14px 14px;
  }

  .tabs {
    margin-inline: -14px;
    padding-inline: 14px;
  }

  .tab {
    padding-inline: 10px;
  }

  .contact-direct p {
    flex-direction: column;
    gap: 2px;
  }

  .media-logos {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .video-side {
    grid-template-columns: minmax(0, 1fr);
  }

  .case-anim-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .header-inner {
    gap: 12px;
  }

  .brand {
    gap: 8px;
  }

  .brand-name {
    font-size: 22px;
  }

  .nav-toggle {
    padding: 9px 10px;
  }

  .demo-sources {
    gap: 5px 6px;
  }

  .demo-source {
    gap: 4px;
    font-size: 11px;
  }

  .demo-source img {
    width: 16px;
    height: 16px;
  }

  .video-toggle {
    min-height: 44px;
  }

  .founder-path li {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 10px;
  }

  .founder-facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .founder-facts > div,
  .founder-facts > div + div {
    padding: 14px 0;
    border-left: 0;
  }

  .formula {
    font-size: clamp(34px, 10vw, 48px);
  }
}

/* 打印：去掉装饰，保留内容 */
@media print {
  .site-header,
  .nav-toggle,
  .hero-actions,
  .diagnose-form,
  .skip-link {
    display: none !important;
  }

  .case {
    background: #fff;
    color: #000;
  }

  .proof-panel {
    display: block !important;
    break-inside: avoid;
  }
}

/* ---------- 转化：合作方式 / CTA 带 / 吸底 ---------- */

.offer-paths {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: clamp(28px, 3.5vw, 40px);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.offer-path {
  padding: 18px 22px 20px 0;
}

.offer-path + .offer-path {
  padding-left: 22px;
  border-left: 1px solid var(--rule);
}

.offer-k {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.offer-path h3 {
  margin-top: 8px;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.offer-path p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-2);
}

.cta-band {
  padding: 0;
  background: var(--paper);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.cta-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(26px, 3.5vw, 40px) 0;
}

.cta-band-kicker {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--signal);
}

.cta-band-text {
  margin-top: 6px;
  font-family: var(--serif);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.cta-band-text span {
  display: block;
  margin-top: 6px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.7;
  color: var(--ink-3);
}

.contact-steps {
  display: grid;
  gap: 8px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
}

.contact-steps li {
  display: flex;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-2);
}

.contact-steps span {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  padding-top: 2px;
}

.mobile-cta {
  display: none;
}

@media (max-width: 900px) {
  .offer-paths {
    grid-template-columns: minmax(0, 1fr);
  }

  .offer-path,
  .offer-path + .offer-path {
    padding: 16px 0;
    border-left: 0;
  }

  .offer-path + .offer-path {
    border-top: 1px solid var(--rule);
  }

  .cta-band-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 760px) {
  body {
    padding-bottom: 84px;
  }

  .mobile-cta {
    position: fixed;
    right: 14px;
    bottom: 14px;
    left: 14px;
    z-index: 80;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    border-radius: 999px;
    background: var(--signal);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-decoration: none;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.4);
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .mobile-cta.is-ready {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }

  .mobile-cta.is-hidden {
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
  }
}

/* ---------- 创始人：能力与经验 ---------- */

.founder-photo {
  position: static;
  align-self: center;
}

.founder-exp-kicker {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--rule-strong);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.founder-exp {
  display: grid;
  gap: 16px;
  margin-top: 14px;
}

.founder-exp-item + .founder-exp-item {
  padding-top: 16px;
  border-top: 1px solid var(--rule);
}

.founder-exp-k {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--ink);
}

.founder-exp-item > p:not(.founder-exp-k) {
  margin-top: 6px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.founder-exp-list {
  display: grid;
  gap: 5px;
  margin-top: 6px;
  padding-left: 1.1em;
  list-style: disc;
}

.founder-exp-list li {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

@media (max-width: 900px) {
  .founder-photo {
    position: static;
  }
}

/* ---------- 问题：对应三块业务 ---------- */

.problem-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.problem-k {
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

@media (max-width: 1024px) {
  .problem-list {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* 问题段前置判断句 + 核心业务过渡 */
.problem-lead {
  margin: 14px 0 10px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

.core-intro {
  padding: clamp(48px, 6vw, 80px) 0 clamp(4px, 1vw, 12px);
}

.core-intro .display {
  font-size: clamp(30px, 2.9vw, 40px);
  line-height: 1.25;
}

.core-intro .section-lede {
  margin-top: 14px;
}

/* 核心业务过渡：右侧三项目录 */
.core-intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.55fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: end;
}

.core-toc {
  border-top: 1px solid var(--rule-strong);
}

.core-toc a {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  text-decoration: none;
}

.core-toc .num {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-3);
}

.core-toc strong {
  font-size: 15px;
  font-weight: 600;
}

.core-toc em {
  display: block;
  margin-top: 2px;
  font-style: normal;
  font-size: 11.5px;
  color: var(--ink-3);
}

.core-toc .arrow {
  color: var(--ink-3);
  font-size: 14px;
  transition: transform 0.2s ease, color 0.2s ease;
}

.core-toc a:hover strong,
.core-toc a:focus-visible strong,
.core-toc a:hover .arrow,
.core-toc a:focus-visible .arrow {
  color: #6aa9ff;
}

.core-toc a:hover .arrow {
  transform: translateX(3px);
}

@media (max-width: 900px) {
  .core-intro-grid {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }
}

/* 核心业务：业务名用蓝色，与「核心业务X：」分层 */
.core-name {
  color: #6aa9ff;
}

/* 怎么合作：四步交付 + 承诺补充 */
.coop-steps-wrap {
  margin-top: clamp(28px, 3.5vw, 40px);
  padding-top: 20px;
  border-top: 1px solid var(--rule-strong);
}

.coop-sub {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.coop-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 14px;
}

.coop-steps li {
  padding: 0 20px;
  border-left: 1px solid var(--rule);
}

.coop-steps li:first-child {
  padding-left: 0;
  border-left: 0;
}

.coop-no {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-3);
}

.coop-steps h3 {
  margin-top: 8px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.coop-steps p {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-2);
}

.coop-time {
  display: block;
  margin-top: 8px;
  font-size: 11px;
  color: var(--ink-3);
}

.coop-caliber {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-2);
}

.promise-note {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

.promise-note strong {
  color: var(--ink);
}

@media (max-width: 900px) {
  .coop-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 0;
  }

  .coop-steps li:nth-child(odd) {
    padding-left: 0;
    border-left: 0;
  }

  .coop-steps li:nth-child(n + 3) {
    padding-top: 16px;
    border-top: 1px solid var(--rule);
  }
}

@media (max-width: 600px) {
  .coop-steps {
    grid-template-columns: minmax(0, 1fr);
  }

  .coop-steps li {
    padding: 14px 0;
    border-left: 0;
    border-top: 1px solid var(--rule);
  }

  .coop-steps li:first-child {
    padding-top: 0;
    border-top: 0;
  }
}

.promise-foot-copy {
  max-width: 46em;
}

.promise-foot-copy p + p {
  margin-top: 8px;
}

/* 内容战略：2.2–2.4 折叠块 */
.cs-acc {
  border-top: 1px solid var(--rule-strong);
  scroll-margin-top: 96px;
}

.cs-acc > summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0;
  cursor: pointer;
  list-style: none;
}

.cs-acc > summary::-webkit-details-marker {
  display: none;
}

.cs-acc > summary:focus-visible {
  outline: 2px solid #6aa9ff;
  outline-offset: 4px;
}

.cs-acc-head {
  display: block;
  min-width: 0;
}

.cs-acc-title {
  display: block;
  margin-top: 12px;
  font-family: var(--serif);
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.cs-acc-summary {
  display: block;
  margin-top: 8px;
  max-width: 52em;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.cs-acc-cta {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
  padding: 7px 13px;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-2);
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.cs-acc-cta::before {
  content: "展开细节";
}

.cs-acc[open] .cs-acc-cta::before {
  content: "收起";
}

.cs-acc-chevron {
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  transition: transform 0.2s ease;
}

.cs-acc[open] .cs-acc-chevron {
  transform: rotate(225deg) translateY(-1px);
}

.cs-acc[open] .cs-acc-cta {
  border-color: #6aa9ff;
  color: #6aa9ff;
  background: rgba(106, 169, 255, 0.06);
}

.cs-acc > summary:hover .cs-acc-title {
  color: #6aa9ff;
}

.cs-acc > summary:hover .cs-acc-cta {
  border-color: #6aa9ff;
  color: #6aa9ff;
}

.cs-acc-body {
  padding: 4px 0 30px;
}

.cs-acc-body > .section-lede {
  margin-top: 0;
  margin-bottom: 18px;
  max-width: 42em;
}

/* 官网页：动图示意 */
.site-visual {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
  margin-top: clamp(36px, 4.5vw, 56px);
  padding-top: clamp(28px, 3.5vw, 40px);
  border-top: 1px solid var(--rule);
}

.site-visual-media {
  margin: 0;
  max-width: 300px;
}

.site-visual-media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  border-radius: 18px;
  background: var(--paper-2);
}

.site-visual-media .site-visual-still {
  display: none;
}

.site-visual-media figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-3);
}

.site-visual-media figcaption span {
  display: block;
  margin-top: 2px;
}

.site-visual-media figcaption a {
  color: var(--ink-3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  text-decoration: none;
}

.site-visual-kicker {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.site-visual-copy ul {
  display: grid;
  gap: 10px;
  margin-top: 14px;
  padding: 0;
  list-style: none;
}

.site-visual-copy li {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}

.site-visual-copy strong {
  color: var(--ink);
}

.site-visual-copy p:not(.site-visual-kicker) {
  margin-top: 14px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-3);
}

@media (prefers-reduced-motion: reduce) {
  .site-visual-media .site-visual-anim {
    display: none;
  }

  .site-visual-media .site-visual-still {
    display: block;
  }
}

@media (max-width: 900px) {
  .site-visual {
    grid-template-columns: minmax(0, 1fr);
  }

  .site-visual-media {
    max-width: 280px;
    margin-inline: auto;
  }
}

/* 核心业务二：背景报纸（左侧幽灵 + 深色遮罩） */
.content-service {
  position: relative;
}

.cs-paper-rail {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: clip;
  pointer-events: none;
}

.cs-paper-bg {
  position: sticky;
  top: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.cs-paper {
  position: absolute;
  top: 50%;
  left: -30px;
  width: 720px;
  height: 960px;
  margin-top: -480px;
  opacity: 0.85;
}

.cs-paper canvas {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 20px 28px rgba(0, 0, 0, 0.45));
  animation: csPaperFloat 8s ease-in-out infinite;
}

.cs-paper-glow {
  position: absolute;
  inset: -60px;
  z-index: 0;
  background: radial-gradient(ellipse at 45% 40%, rgba(127, 182, 216, 0.14), transparent 65%);
  filter: blur(24px);
}

.cs-paper-veil {
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(180deg, rgba(6, 11, 18, 0.18) 0%, rgba(6, 11, 18, 0.42) 50%, rgba(6, 11, 18, 0.82) 100%),
    linear-gradient(90deg, rgba(6, 11, 18, 0.42) 0%, rgba(6, 11, 18, 0.38) 50%, rgba(6, 11, 18, 0.5) 100%);
}

.cs-text-shade {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: min(1180px, 100%);
  transform: translateX(-50%);
  z-index: 3;
  pointer-events: none;
  background: linear-gradient(90deg, transparent 0%, #060b12 1.5%, #060b12 98.5%, transparent 100%);
}

.content-service .wrap {
  position: relative;
  z-index: 1;
}

@keyframes csPaperFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

@media (max-width: 1199px) {
  .cs-paper-bg {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cs-paper canvas {
    animation: none;
  }
}

/* 右侧错落叠放的报纸页（不透明，由遮罩压暗） */
.cs-paper-stack {
  position: absolute;
  top: 50%;
  right: 100px;
  z-index: 1;
  width: 580px;
  height: 900px;
  margin-top: -450px;
  pointer-events: none;
}

.cs-paper-mini {
  position: absolute;
  display: block;
  width: 330px;
  height: 455px;
  border: 1px solid rgba(20, 19, 17, 0.2);
  background: #f4efe3;
  box-shadow: 0 22px 36px rgba(0, 0, 0, 0.5);
  transform-origin: 50% 50%;
}

.cs-paper-mini:nth-child(1) {
  top: 0;
  right: 0;
  transform: rotate(8deg);
}

.cs-paper-mini:nth-child(2) {
  top: 160px;
  right: 140px;
  transform: rotate(-10deg) scale(0.96);
}

.cs-paper-mini:nth-child(3) {
  top: 340px;
  right: 50px;
  transform: rotate(4deg) scale(0.92);
}

@keyframes miniFloat {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -10px; }
}

@media (max-width: 1399px) {
  .cs-paper-stack {
    display: none;
  }
}

/* 为什么现在：不行动的代价 + 轻 CTA */
.shift-cost {
  display: grid;
  gap: 10px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

.shift-cost li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}

.shift-cost li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--signal);
}

.shift-cta {
  margin-top: 20px;
}

.shift-cta a {
  display: inline-block;
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(106, 169, 255, 0.5);
  font-size: 14px;
  color: #6aa9ff;
  text-decoration: none;
}

.shift-cta a:hover {
  border-bottom-color: #6aa9ff;
}

.core-intro {
  scroll-margin-top: 96px;
}

/* 联系方式图片 / 二维码 / 页脚联系 */
.contact-img {
  height: 17px;
  width: auto;
}

.contact-qr {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.contact-qr img {
  width: 96px;
  height: 96px;
  border-radius: 6px;
}

.contact-qr span {
  font-size: 12.5px;
  color: var(--ink-3);
}

.footer-contact {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.footer-contact p {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}

.footer-contact .contact-label {
  width: 36px;
}

.footer-qr {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 2px;
}

.footer-qr img {
  width: 96px;
  height: 96px;
  border-radius: 6px;
}

.footer-qr span {
  font-size: 12px;
  color: var(--ink-3);
}

/* 页脚：上层品牌+导航，下层公司信息全宽 */
.footer-grid {
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px 56px;
}

.footer-brand {
  grid-column: 1;
}

.footer-nav {
  grid-column: 2;
  justify-self: end;
}

.footer-meta {
  grid-column: 1 / -1;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.footer-meta-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 13.5px;
  color: var(--ink-2);
}

.footer-address {
  font-size: 13.5px;
  color: var(--ink-2);
}

.footer-meta-bottom {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr) minmax(0, 0.9fr);
  gap: 24px 48px;
  margin-top: 20px;
}

.footer-contact p {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 13px;
}

.footer-contact .contact-label {
  width: 36px;
}

.footer-legal p,
.footer-notes p {
  font-size: 13px;
  color: var(--ink-2);
}

.footer-legal p + p,
.footer-notes p + p {
  margin-top: 6px;
}

@media (max-width: 900px) {
  .footer-meta-bottom {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 1200px) {
  .footer-meta-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* 页脚：用户提供的整块设计图（桌面），窄屏用同内容可读版 */
.footer-figure {
  grid-column: 1 / -1;
  margin: 30px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.footer-figure img {
  display: block;
  width: 100%;
  max-width: 1120px;
  height: auto;
  margin: 0 auto;
}

.footer-meta-mobile {
  display: none;
}

@media (max-width: 900px) {
  .footer-figure {
    display: none;
  }

  .footer-meta-mobile {
    display: block;
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
  }
}

/* 页脚顺序：联系/公司信息在上，品牌+导航在下 */
.footer-grid {
  display: block;
}

.footer-figure {
  margin: 0;
  padding: 0;
  border-top: 0;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px 56px;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.footer-top .footer-brand,
.footer-top .footer-nav {
  grid-column: auto;
}

.footer-meta-mobile {
  display: none;
}

@media (max-width: 900px) {
  .footer-meta-mobile {
    display: block;
    margin: 0;
    padding: 0;
    border: 0;
  }

  .footer-top {
    grid-template-columns: minmax(0, 1fr);
    margin-top: 24px;
    padding-top: 20px;
  }

  .footer-top .footer-nav {
    justify-self: start;
  }
}