/* ==========================================================
   观微科技 · 官网样式
   依据《观微-品牌手册》v1.1
   ========================================================== */

@font-face {
  font-family: "APHT Display";
  src: url("/assets/fonts/APHT-Display.woff2") format("woff2");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

:root {
  --ink: #141518;
  --stone: #212327;
  --rock: #34373C;
  --gravel: #5A5E64;
  --smoke: #8A8E95;
  --silver: #C4C7CC;
  --mist: #E8E9EB;
  --paper: #F6F6F7;
  --white: #FFFFFF;
  --accent: #0AE0C0;
  --accent-dim: rgba(10, 224, 192, 0.12);
  --line: #E4E5E7;
  --line-strong: #D5D7DA;
  --inverse: #F2F3F4;

  --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-en: "Helvetica Neue", "Arial", sans-serif;
  --font-display: "APHT Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --max: 1440px;
  --gutter: 96px;
  --gap: 24px;
  --nav-h: 88px;

  --ease: cubic-bezier(.22, .61, .21, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);

  --fs-display: clamp(52px, 6.4vw, 94px);
  --fs-h1: clamp(42px, 5.1vw, 76px);
  --fs-h2: clamp(32px, 3.6vw, 52px);
  --fs-h3: clamp(22px, 2.2vw, 30px);
  --fs-lead: clamp(20px, 1.7vw, 24px);
  --fs-body: 17px;
  --fs-small: 14px;
  --fs-micro: 11px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--stone);
  font-family: var(--font-cn);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.9;
  letter-spacing: .03em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.menu-open { overflow: hidden; }

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4, p, figure { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--stone); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--stone);
  outline-offset: 4px;
}
.section--dark :focus-visible,
.footer :focus-visible,
.menu :focus-visible { outline-color: var(--accent); }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.skip {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 16px;
  background: var(--stone);
  color: var(--paper);
  font-size: 13px;
  transform: translateY(-160%);
  transition: transform .2s var(--ease);
}
.skip:focus { transform: none; }

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

/* ---------- 通用文字 ---------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-en);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--gravel);
  line-height: 1.4;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
  opacity: .7;
}
.eyebrow--plain::before { display: none; }
.section--dark .eyebrow { color: var(--silver); }

.dot {
  display: inline-block;
  width: .14em;
  height: .14em;
  margin-left: .18em;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: .06em;
}

.lead {
  font-size: var(--fs-lead);
  font-weight: 300;
  line-height: 1.75;
  letter-spacing: .04em;
  color: var(--gravel);
}

.section--dark .lead { color: var(--silver); }

.muted { color: var(--gravel); }

/* ---------- 按钮与链接 ---------- */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 52px;
  padding: 0 30px;
  border: 1px solid var(--stone);
  border-radius: 2px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .12em;
  line-height: 1;
  color: var(--stone);
  background: transparent;
  cursor: pointer;
  overflow: hidden;
  transition: color .4s var(--ease), background .4s var(--ease), border-color .4s var(--ease);
}
.btn svg { width: 16px; height: 16px; transition: transform .4s var(--ease); }
.btn:hover svg { transform: translateX(4px); }
.btn--solid { background: var(--stone); color: var(--paper); }
.btn--solid:hover { background: transparent; color: var(--stone); }
.btn--ghost:hover { background: var(--stone); color: var(--paper); }
.btn--light { border-color: rgba(255, 255, 255, .4); color: var(--paper); }
.btn--light:hover { background: var(--paper); color: var(--stone); border-color: var(--paper); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line-strong);
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--stone);
  transition: border-color .3s var(--ease);
}
.link-arrow svg { width: 16px; height: 16px; transition: transform .3s var(--ease); }
.link-arrow:hover { border-color: var(--stone); }
.link-arrow:hover svg { transform: translateX(5px); }

.section--dark .link-arrow { color: var(--paper); border-color: rgba(255, 255, 255, .3); }
.section--dark .link-arrow:hover { border-color: var(--paper); }

/* ---------- 导航 ---------- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background .4s var(--ease), border-color .4s var(--ease), backdrop-filter .4s var(--ease);
}
.nav.is-scrolled {
  background: rgba(246, 246, 247, .88);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom-color: var(--line);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max);
  height: var(--nav-h);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 15px;
  line-height: 1;
}
.brand__mark {
  width: auto;
  height: 40px;
  color: var(--ink);
  flex: none;
}
.brand__text { display: flex; flex-direction: column; gap: 5px; }
.brand__name {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--stone);
  line-height: 1;
}
.brand__tag {
  font-family: var(--font-en);
  font-size: 8px;
  font-weight: 500;
  letter-spacing: .36em;
  color: var(--gravel);
  line-height: 1;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav__links > a {
  position: relative;
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--gravel);
  line-height: 1;
  transition: color .3s var(--ease);
}
.nav__links > a:not(.nav__cta)::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  height: 1px;
  background: var(--stone);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .35s var(--ease);
}
.nav__links > a:not(.nav__cta):hover::after,
.nav__links > a.is-active::after { transform: scaleX(1); transform-origin: left; }
.nav__links > a:hover,
.nav__links > a.is-active { color: var(--stone); }
.nav__cta {
  padding: 12px 24px;
  border: 1px solid var(--stone);
  color: var(--stone) !important;
  transition: background .35s var(--ease), color .35s var(--ease);
}
.nav__cta:hover { background: var(--stone); color: var(--paper) !important; }

.nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  position: relative;
}
.nav__toggle span {
  position: absolute;
  left: 10px;
  right: 10px;
  height: 1px;
  background: var(--stone);
  transition: transform .4s var(--ease), top .4s var(--ease), opacity .3s;
}
.nav__toggle span:nth-child(1) { top: 18px; }
.nav__toggle span:nth-child(2) { top: 26px; }
.nav__toggle[aria-expanded="true"] span:nth-child(1) { top: 22px; transform: rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { top: 22px; transform: rotate(-45deg); }

.menu {
  position: fixed;
  inset: 0;
  z-index: 99;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: calc(var(--nav-h) + 48px) var(--gutter) 40px;
  background: var(--stone);
  color: var(--paper);
  transform: translateY(-100%);
  visibility: hidden;
  transition: transform .7s var(--ease-out), visibility .7s;
}
.menu.is-open { transform: none; visibility: visible; }
.menu__nav { display: flex; flex-direction: column; }
.menu__nav a {
  padding: 20px 0;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  font-size: clamp(18px, 4.8vw, 24px);
  font-weight: 300;
  letter-spacing: .08em;
  color: var(--paper);
  line-height: 1.2;
}
.menu__nav a:first-child { border-top: 1px solid rgba(255, 255, 255, .12); }
.menu__foot {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, .12);
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--silver);
}
.menu__foot span { font-family: var(--font-cn); letter-spacing: .16em; }

.menu-open .nav {
  background: transparent;
  border-bottom-color: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}
.menu-open .brand__mark { color: var(--paper); }
.menu-open .brand__name { color: var(--paper); }
.menu-open .brand__tag { color: var(--silver); }
.menu-open .nav__toggle span { background: var(--paper); }

/* ---------- 首屏 ---------- */

.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100svh;
  padding: calc(var(--nav-h) + 44px) 0 24px;
  overflow: hidden;
}
.hero__mark {
  position: absolute;
  top: 50%;
  right: -1.5vw;
  height: 88vh;
  width: auto;
  transform: translateY(-46%);
  color: var(--ink);
  opacity: .035;
  pointer-events: none;
}
.hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
  align-items: center;
  width: 100%;
}
.hero__copy { grid-column: 1 / span 7; }
.hero__title {
  font-family: var(--font-display);
  margin-top: 26px;
  font-size: var(--fs-display);
  font-weight: 300;
  line-height: 1.06;
  letter-spacing: .09em;
  color: var(--stone);
}
.hero__title span { display: block; }
.hero__title .line2 { margin-left: .82em; }
.hero__sub {
  margin-top: 28px;
  font-size: clamp(19px, 1.6vw, 24px);
  font-weight: 400;
  letter-spacing: .06em;
  line-height: 1.7;
  color: var(--gravel);
}
.hero__sub b { font-weight: 600; color: var(--stone); }
.hero__desc {
  max-width: 560px;
  margin-top: 20px;
  font-size: 16px;
  line-height: 1.95;
  letter-spacing: .03em;
  color: var(--gravel);
}
.hero__actions {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-top: 36px;
}
.hero__meta {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--line-strong);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gravel);
}
.hero__meta-label {
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--gravel);
}
.hero__platforms { display: flex; flex-wrap: wrap; gap: 24px; }
.hero__platforms span { color: var(--gravel); }

.hero__visual {
  grid-column: 8 / span 5;
  justify-self: end;
  width: 100%;
  max-width: 410px;
}

/* AI 回答卡片 */

.answer {
  position: relative;
  padding: 26px 26px 20px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 30px 90px rgba(20, 21, 24, .07);
  transition: opacity 1s var(--ease-out), transform 1s var(--ease-out);
}
.js .answer { opacity: 0; transform: translateY(26px); }
.is-ready .answer { opacity: 1; transform: none; }
.answer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 72px;
  height: 1px;
  background: var(--accent);
}
.answer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-en);
  font-size: 9px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--gravel);
}
.answer__live { display: inline-flex; align-items: center; gap: 8px; }
.answer__live i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-dim);
}
.answer__query { padding: 20px 0 16px; }
.answer__query-label {
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--gravel);
}
.answer__query p {
  margin-top: 8px;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--stone);
  line-height: 1.5;
}
.answer__list { border-top: 1px solid var(--line); }
.answer__row {
  display: grid;
  grid-template-columns: 26px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  color: var(--gravel);
}
.answer__rank {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gravel);
}
.answer__name { letter-spacing: .04em; }
.answer__note {
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--gravel);
}
.answer__row--target {
  position: relative;
  margin: 0 -26px;
  padding: 14px 26px;
  background: linear-gradient(90deg, rgba(10, 224, 192, .085), rgba(10, 224, 192, 0));
  border-left: 2px solid var(--accent);
  border-bottom-color: transparent;
  color: var(--stone);
}
.answer__row--target .answer__rank { color: var(--stone); }
.answer__row--target .answer__name { font-weight: 600; }
.answer__row--target .answer__note { color: var(--stone); }
.answer__sources {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 0 4px;
}
.answer__sources span {
  padding: 5px 9px;
  border: 1px solid var(--line-strong);
  font-size: 9px;
  letter-spacing: .1em;
  color: var(--gravel);
  line-height: 1;
}
.answer__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gravel);
}
.answer__foot svg { width: 14px; height: 14px; color: var(--stone); }

/* ---------- 区块 ---------- */

.section { position: relative; padding: 120px 0; }
.section--tight { padding: 80px 0; }
.section--dark { background: var(--stone); color: var(--inverse); padding: 96px 0; }
.section--ink { background: var(--ink); color: var(--inverse); }
.section--white { background: var(--white); }
.section--line { border-top: 1px solid var(--line-strong); }

#what, #method, #cases, #capability {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100svh;
}
#what { padding: 112px 0 0; }
#cases { padding: 88px 0 0; }
#capability { padding: 104px 0 0; }
#capability .resource { margin-top: 12px; }
#capability { padding: 72px 0; }
#what .section__head { margin-bottom: 24px; }
#capability .section__head { margin-bottom: 16px; }
#what .geo-stat { margin-top: 32px; }
.section__head {
  display: block;
  margin-bottom: 64px;
}
.section__label { grid-column: 1 / span 3; padding-top: 10px; }
.section__title {
  text-wrap: balance;
  max-width: 1100px;
  font-size: var(--fs-h2);
  font-weight: 500;
  line-height: 1.34;
  letter-spacing: .06em;
  color: var(--stone);
}
.section--dark .section__title { color: var(--inverse); }
.section__title em {
  font-style: normal;
  color: var(--smoke);
}
.section--dark .section__title em { color: var(--silver); }

.section__body { display: block; }
.section__body-main { max-width: 1000px; }
.section__body-side { display: none; }

/* ---------- 首屏之后：GEO 解释 ---------- */

.geo-statement {
  font-family: var(--font-display);
  font-size: clamp(34px, 4.6vw, 60px);
  font-weight: 300;
  line-height: 1.42;
  letter-spacing: .05em;
  color: var(--inverse);
}
.geo-statement em {
  font-style: normal;
  color: var(--accent);
}
.geo-copy {
  max-width: 620px;
  margin-top: 24px;
  font-size: 17px;
  line-height: 2.05;
  color: var(--silver);
}
.geo-copy strong { color: var(--paper); font-weight: 500; }

.geo-flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 44px;
  border-top: 1px solid rgba(255, 255, 255, .18);
}
.geo-flow__step {
  position: relative;
  padding: 20px 32px 0 32px;
  border-right: 1px solid rgba(255, 255, 255, .12);
}
.geo-flow__step:first-child { padding-left: 0; }
.geo-flow__step:last-child { border-right: 0; padding-right: 0; }
.geo-flow__num {
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .24em;
  color: var(--silver);
}
.geo-flow__title {
  margin-top: 14px;
  font-size: 21px;
  font-weight: 500;
  letter-spacing: .05em;
  color: var(--paper);
}
.geo-flow__text {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--silver);
}
.geo-flow__step::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 1.2s var(--ease-out);
}
.geo-flow__step.is-in::after { width: 100%; }

.geo-stat {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, .18);
}
.geo-stat__num {
  font-family: var(--font-en);
  font-size: clamp(48px, 6vw, 76px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--accent);
}
.geo-stat__label { font-size: 14px; line-height: 1.8; color: var(--silver); }
.geo-stat__source { margin-left: auto; font-size: 10px; letter-spacing: .08em; color: var(--silver); }

/* ---------- 方法 ---------- */

.method {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
}
.method__step {
  position: relative;
  padding: 30px 26px 0 26px;
  border-right: 1px solid var(--line);
  min-height: 250px;
}
.method__step:first-child { padding-left: 0; }
.method__step:last-child { border-right: 0; padding-right: 0; }
.method__num {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--gravel);
}
.method__title {
  margin-top: 20px;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: .05em;
  color: var(--stone);
  line-height: 1.5;
}
.method__text {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.95;
  color: var(--gravel);
}
.method__step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 1s var(--ease-out) .1s;
}
.method__step.is-in::before { width: 100%; }

/* ---------- 案例列表 ---------- */

.cases-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 40px;
}
.case-list { border-top: 1px solid var(--line-strong); }
.case-row {
  display: grid;
  grid-template-columns: 1.1fr 2.5fr 1.9fr 32px;
  gap: var(--gap);
  align-items: center;
  padding: 38px 0;
  border-bottom: 1px solid var(--line);
  transition: background .4s var(--ease), padding .4s var(--ease);
}
.case-row:hover { background: var(--white); padding-left: 18px; padding-right: 18px; }
.case-row__index {
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--gravel);
}
.case-row__industry {
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--gravel);
}
.case-row__title {
  font-size: clamp(18px, 1.55vw, 22px);
  font-weight: 500;
  letter-spacing: .04em;
  line-height: 1.55;
  color: var(--stone);
}
.case-row__metrics { display: flex; gap: 34px; }
.metric__num {
  display: block;
  font-family: var(--font-en);
  font-size: 27px;
  font-weight: 400;
  letter-spacing: -.01em;
  line-height: 1.1;
  color: var(--stone);
}
.metric__label {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--gravel);
  line-height: 1.4;
}
.case-row__arrow {
  width: 24px;
  height: 24px;
  color: var(--silver);
  justify-self: end;
  transition: transform .4s var(--ease), color .4s var(--ease);
}
.case-row:hover .case-row__arrow { transform: translateX(6px); color: var(--stone); }

.case-note {
  margin-top: 24px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gravel);
  line-height: 1.9;
}

/* ---------- 能力 ---------- */

.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, .16);
  border-left: 1px solid rgba(255, 255, 255, .16);
}
.cap {
  position: relative;
  min-height: 170px;
  padding: 12px 38px;
  border-right: 1px solid rgba(255, 255, 255, .16);
  border-bottom: 1px solid rgba(255, 255, 255, .16);
  transition: background .5s var(--ease);
}
.cap:hover { background: rgba(255, 255, 255, .03); }
.cap__en {
  font-family: var(--font-en);
  font-size: 9px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--silver);
}
.cap__name {
  margin-top: 12px;
  font-family: var(--font-en);
  font-size: 26px;
  font-weight: 400;
  letter-spacing: .02em;
  color: var(--paper);
}
.cap__cn { margin-top: 4px; font-size: 13px; letter-spacing: .1em; color: var(--silver); }
.cap__text { max-width: 420px; margin-top: 16px; font-size: 15px; line-height: 1.95; color: var(--silver); }
.cap__no {
  position: absolute;
  top: 36px;
  right: 36px;
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--silver);
}

.resource {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, .16);
}
.resource__item { padding: 30px 24px 0 24px; border-right: 1px solid rgba(255, 255, 255, .12); }
.resource__item:first-child { padding-left: 0; }
.resource__item:last-child { border-right: 0; }
.resource__num {
  font-family: var(--font-en);
  font-size: clamp(34px, 4vw, 54px);
  font-weight: 300;
  letter-spacing: -.02em;
  line-height: 1;
  color: var(--paper);
}
.resource__num span { font-size: .5em; color: var(--silver); margin-left: 2px; }
.resource__label { margin-top: 12px; font-size: 13px; letter-spacing: .06em; color: var(--silver); }

/* ---------- 关于 ---------- */

.about-split {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(40px, 7vw, 110px);
  align-items: center;
}
.mark-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 540px;
  background: var(--white);
  border: 1px solid var(--line);
}
.mark-stage__mark { height: 380px; width: auto; color: var(--ink); }
.mark-stage__label {
  position: absolute;
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--gravel);
  line-height: 1.6;
}
.mark-stage__label--eye { top: 58px; right: 132px; text-align: right; }
.mark-stage__label--person { bottom: 64px; right: 118px; text-align: right; }
.mark-stage__label--name { top: 50%; left: 28px; transform: translateY(-50%); }
.mark-stage__label::before {
  content: "";
  display: inline-block;
  width: 34px;
  height: 1px;
  margin-right: 10px;
  background: var(--silver);
  vertical-align: middle;
}
.mark-stage__grid {
  position: absolute;
  inset: 22px;
  border: 1px solid var(--line);
  pointer-events: none;
}
.about-copy .section__title { font-size: clamp(30px, 3.4vw, 48px); }
.about-copy p { margin-top: 26px; font-size: 16px; line-height: 2.05; color: var(--gravel); max-width: 560px; }
.about-copy p strong { color: var(--stone); font-weight: 500; }
.about-copy .link-arrow { margin-top: 36px; }
.about-text { max-width: 720px; margin-top: 22px; font-size: 19px; line-height: 2; letter-spacing: .02em; color: var(--gravel); }
.about-text:first-child { margin-top: 0; }
.about-text strong { color: var(--stone); font-weight: 500; }

/* ---------- CTA ---------- */

.cta {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100svh;
  padding: 160px 0;
  background: var(--stone);
  color: var(--inverse);
  overflow: hidden;
}
.cta__glyph {
  position: absolute;
  right: 1vw;
  bottom: -.18em;
  font-size: clamp(240px, 42vw, 640px);
  font-weight: 300;
  line-height: .8;
  letter-spacing: -.02em;
  color: rgba(255, 255, 255, .035);
  pointer-events: none;
  user-select: none;
}
.cta__inner { position: relative; z-index: 2; }
.cta__title {
  font-family: var(--font-display);
  text-wrap: balance;
  max-width: 1000px;
  font-size: clamp(44px, 6.4vw, 104px);
  font-weight: 300;
  line-height: 1.24;
  letter-spacing: .07em;
  color: var(--inverse);
}
.cta__title em { font-style: normal; color: var(--accent); }
.cta__row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, .18);
}
.cta__desc { max-width: 380px; font-size: 15px; line-height: 1.95; color: var(--silver); }
.cta__actions { display: flex; align-items: center; gap: 28px; flex: none; }

/* ---------- 页头 ---------- */

.page-hero {
  position: relative;
  padding: calc(var(--nav-h) + 96px) 0 86px;
  border-bottom: 1px solid var(--line-strong);
  overflow: hidden;
}
.page-hero__inner { position: relative; z-index: 2; }
.page-hero__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 44px;
}
.page-hero__index {
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .26em;
  color: var(--gravel);
}
.page-hero h1 {
  font-family: var(--font-display);
  text-wrap: balance;
  max-width: 1000px;
  font-size: var(--fs-h1);
  font-weight: 300;
  line-height: 1.22;
  letter-spacing: .07em;
  color: var(--stone);
}
.page-hero__lead {
  max-width: 660px;
  margin-top: 30px;
  font-size: var(--fs-lead);
  font-weight: 300;
  line-height: 1.8;
  letter-spacing: .04em;
  color: var(--gravel);
}
.page-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 11px;
  border: 1px solid var(--line-strong);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--gravel);
  line-height: 1;
  white-space: nowrap;
}

/* ---------- 文章与列表 ---------- */

.prose { max-width: 760px; }
.prose h2 {
  margin: 64px 0 20px;
  font-size: clamp(26px, 2.6vw, 34px);
  font-weight: 500;
  letter-spacing: .05em;
  line-height: 1.4;
  color: var(--stone);
}
.prose h3 {
  margin: 40px 0 14px;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--stone);
}
.prose p { margin: 16px 0; font-size: 17px; line-height: 2.05; color: var(--gravel); }
.prose ul { margin: 16px 0; }
.prose li {
  position: relative;
  padding-left: 18px;
  margin: 10px 0;
  font-size: 16px;
  line-height: 1.95;
  color: var(--gravel);
}
.prose li::before {
  content: "";
  position: absolute;
  top: .95em;
  left: 0;
  width: 6px;
  height: 1px;
  background: var(--silver);
}
.prose a { border-bottom: 1px solid var(--silver); }
.prose a:hover { border-color: var(--stone); }

/* ---------- GEO 页 ---------- */

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
}
.problem {
  padding: 32px 30px 0 30px;
  border-right: 1px solid var(--line);
  min-height: 230px;
}
.problem:first-child { padding-left: 0; }
.problem:last-child { border-right: 0; padding-right: 0; }
.problem__num {
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .24em;
  color: var(--gravel);
}
.problem__title {
  margin-top: 20px;
  font-size: 21px;
  font-weight: 500;
  letter-spacing: .04em;
  line-height: 1.5;
  color: var(--stone);
}
.problem__text { margin-top: 12px; font-size: 15px; line-height: 1.95; color: var(--gravel); }

.steps { border-top: 1px solid var(--line-strong); }
.step {
  display: grid;
  grid-template-columns: 90px 1.1fr 2.2fr;
  gap: var(--gap);
  padding: 42px 0;
  border-bottom: 1px solid var(--line);
}
.step__num {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--gravel);
  padding-top: 6px;
}
.step__title { font-size: clamp(22px, 2vw, 28px); font-weight: 500; letter-spacing: .04em; line-height: 1.4; color: var(--stone); }
.step__text { font-size: 15px; line-height: 2; color: var(--gravel); }
.step__text p + p { margin-top: 12px; }
.step__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }

.deliver-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
}
.deliver {
  padding: 32px 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  min-height: 200px;
}
.deliver__num { font-family: var(--font-en); font-size: 10px; letter-spacing: .2em; color: var(--gravel); }
.deliver__title { margin-top: 16px; font-size: 18px; font-weight: 500; letter-spacing: .04em; color: var(--stone); }
.deliver__text { margin-top: 10px; font-size: 14px; line-height: 1.9; color: var(--gravel); }

.phase-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
}
.phase { padding: 32px 30px 0 30px; border-right: 1px solid var(--line); min-height: 230px; }
.phase:first-child { padding-left: 0; }
.phase:last-child { border-right: 0; padding-right: 0; }
.phase__label { font-family: var(--font-en); font-size: 9px; letter-spacing: .28em; color: var(--gravel); }
.phase__title { margin-top: 14px; font-size: 24px; font-weight: 500; letter-spacing: .04em; color: var(--stone); }
.phase__time { margin-top: 4px; font-size: 11px; letter-spacing: .08em; color: var(--gravel); }
.phase__text { margin-top: 16px; font-size: 15px; line-height: 1.95; color: var(--gravel); }

.faq { border-top: 1px solid var(--line-strong); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0;
  cursor: pointer;
  list-style: none;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: .03em;
  color: var(--stone);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 300;
  color: var(--gravel);
  transition: transform .3s var(--ease);
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq__body {
  max-width: 760px;
  padding: 0 0 28px;
  font-size: 16px;
  line-height: 2;
  color: var(--gravel);
}

/* ---------- 案例页 ---------- */

.case-study {
  scroll-margin-top: calc(var(--nav-h) + 24px);
  display: grid;
  grid-template-columns: 3fr 9fr;
  gap: clamp(40px, 6vw, 100px);
  padding: 92px 0;
  border-top: 1px solid var(--line-strong);
}
.case-study:first-of-type { border-top: 0; }
.case-study__meta { position: sticky; top: calc(var(--nav-h) + 32px); align-self: start; }
.case-study__index { font-family: var(--font-en); font-size: 10px; letter-spacing: .24em; color: var(--gravel); }
.case-study__industry { margin-top: 18px; font-size: 12px; letter-spacing: .14em; color: var(--gravel); }
.case-study__period { margin-top: 6px; font-size: 12px; letter-spacing: .06em; color: var(--gravel); }
.case-study__platforms { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 18px; }
.case-study__platforms span {
  padding: 4px 8px;
  border: 1px solid var(--line-strong);
  font-size: 9px;
  letter-spacing: .06em;
  color: var(--gravel);
  line-height: 1;
}
.case-study__title {
  text-wrap: balance;
  font-size: clamp(28px, 3.2vw, 44px);
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: .04em;
  color: var(--stone);
}
.case-study__body > p {
  max-width: 720px;
  margin-top: 22px;
  font-size: 17px;
  line-height: 2.05;
  color: var(--gravel);
}
.case-study__sub {
  margin-top: 44px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-en);
  font-size: 9px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--gravel);
}
.case-study__list { margin-top: 18px; }
.case-study__list li {
  position: relative;
  padding: 10px 0 10px 20px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.9;
  color: var(--gravel);
}
.case-study__list li::before {
  content: "";
  position: absolute;
  top: 1.5em;
  left: 0;
  width: 7px;
  height: 1px;
  background: var(--silver);
}
.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 44px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}
.case-metric { padding: 24px 24px 24px 24px; border-right: 1px solid var(--line); }
.case-metric:first-child { padding-left: 0; }
.case-metric:last-child { border-right: 0; }
.case-metric__num {
  font-family: var(--font-en);
  font-size: clamp(30px, 3.2vw, 44px);
  font-weight: 300;
  letter-spacing: -.02em;
  line-height: 1;
  color: var(--stone);
}
.case-metric__label { margin-top: 10px; font-size: 11px; letter-spacing: .08em; color: var(--gravel); line-height: 1.5; }

.data-note {
  max-width: 760px;
  margin-top: 24px;
  padding: 20px 24px;
  border-left: 2px solid var(--silver);
  background: var(--white);
  font-size: 12px;
  line-height: 1.95;
  color: var(--gravel);
}
.data-note strong { color: var(--stone); font-weight: 500; }

.more-cases {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
}
.more-case { padding: 28px 28px 0 28px; border-right: 1px solid var(--line); min-height: 190px; }
.more-case:first-child { padding-left: 0; }
.more-case:last-child { border-right: 0; padding-right: 0; }
.more-case__tag { font-size: 10px; letter-spacing: .16em; color: var(--gravel); }
.more-case__title { margin-top: 14px; font-size: 20px; font-weight: 500; letter-spacing: .03em; line-height: 1.5; color: var(--stone); }
.more-case__num {
  margin-top: 26px;
  font-family: var(--font-en);
  font-size: 34px;
  font-weight: 300;
  letter-spacing: -.02em;
  line-height: 1;
  color: var(--stone);
}
.more-case__num span { font-size: .55em; color: var(--gravel); }
.more-case__label { margin-top: 6px; font-size: 10px; letter-spacing: .08em; color: var(--gravel); }
.more-case__text { margin-top: 18px; font-size: 13px; line-height: 1.9; color: var(--gravel); }

/* ---------- 关于页 ---------- */

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
}
.principle { padding: 30px 30px 0 30px; border-right: 1px solid var(--line); min-height: 240px; }
.principle:first-child { padding-left: 0; }
.principle:last-child { border-right: 0; padding-right: 0; }
.principle__num { font-family: var(--font-en); font-size: 10px; letter-spacing: .22em; color: var(--gravel); }
.principle__title { margin-top: 18px; font-size: 22px; font-weight: 500; letter-spacing: .04em; color: var(--stone); line-height: 1.5; }
.principle__text { margin-top: 12px; font-size: 15px; line-height: 1.95; color: var(--gravel); }

.team-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
}
.team {
  padding: 24px 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  min-height: 150px;
}
.team__name { font-size: 16px; font-weight: 500; letter-spacing: .04em; color: var(--stone); }
.team__text { margin-top: 8px; font-size: 12px; line-height: 1.8; color: var(--gravel); }

/* ---------- 联系页 ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(40px, 7vw, 110px);
  align-items: start;
}
.contact-copy .section__title { font-size: clamp(30px, 3.4vw, 46px); }
.contact-copy p { max-width: 440px; margin-top: 22px; font-size: 16px; line-height: 2; color: var(--gravel); }
.contact-info { margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--line-strong); }
.contact-info__row { display: flex; justify-content: space-between; gap: 24px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.contact-info__label { color: var(--gravel); letter-spacing: .08em; }
.contact-info__value { color: var(--stone); text-align: right; }
.contact-info__value a { border-bottom: 1px solid var(--silver); }
.contact-info__value a:hover { border-color: var(--stone); }

.form {
  padding: 36px;
  background: var(--white);
  border: 1px solid var(--line);
}
.form__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.form__title { font-size: 20px; font-weight: 500; letter-spacing: .04em; color: var(--stone); }
.form__req { font-size: 10px; letter-spacing: .08em; color: var(--gravel); }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; }
.field { position: relative; margin-bottom: 26px; }
.field label {
  display: block;
  margin-bottom: 8px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gravel);
}
.field label span { color: var(--gravel); }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 10px 0 12px;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  font-family: inherit;
  font-size: 16px;
  letter-spacing: .02em;
  color: var(--stone);
  outline: none;
  transition: border-color .3s var(--ease);
}
.field input::placeholder,
.field textarea::placeholder { color: var(--silver); }
.field input:focus,
.field select:focus,
.field textarea:focus { border-bottom-color: var(--stone); box-shadow: 0 1px 0 var(--stone); }
.field select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%238A8E95' stroke-width='1'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 2px center;
  cursor: pointer;
}
.field textarea { min-height: 88px; resize: vertical; }
.field--full { grid-column: 1 / -1; }
.field--consent { display: flex; align-items: flex-start; gap: 10px; margin: 4px 0 28px; }
.field--consent input { width: 14px; height: 14px; margin: 3px 0 0; accent-color: var(--stone); flex: none; }
.field--consent label { margin: 0; font-size: 12px; line-height: 1.8; color: var(--gravel); letter-spacing: .02em; }
.field--consent a { border-bottom: 1px solid var(--silver); }
.form__submit { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.form__hint { max-width: 260px; font-size: 11px; line-height: 1.7; color: var(--gravel); }
.form__status {
  display: none;
  margin-top: 18px;
  padding: 12px 14px;
  border-left: 2px solid var(--accent);
  background: rgba(10, 224, 192, .06);
  font-size: 13px;
  line-height: 1.8;
  color: var(--stone);
}
.form__status.is-visible { display: block; }
.form__status.is-error { border-left-color: var(--stone); background: var(--mist); }
.honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* ---------- 页脚 ---------- */

.footer {
  position: relative;
  padding: 96px 0 34px;
  background: var(--ink);
  color: var(--silver);
  overflow: hidden;
}
.footer__glyph {
  position: absolute;
  top: 50%;
  right: 2vw;
  transform: translateY(-50%);
  font-size: clamp(180px, 28vw, 420px);
  font-weight: 300;
  line-height: .8;
  color: rgba(255, 255, 255, .03);
  pointer-events: none;
  user-select: none;
}
.footer .container { position: relative; z-index: 2; }
.footer__top {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 72px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.brand--footer .brand__mark { color: var(--paper); height: 36px; }
.brand--footer .brand__name { color: var(--paper); }
.brand--footer .brand__tag { color: var(--silver); }
.footer__slogan {
  margin-top: 32px;
  font-size: clamp(24px, 2.6vw, 36px);
  font-weight: 300;
  line-height: 1.5;
  letter-spacing: .12em;
  color: var(--paper);
}
.footer__en {
  margin-top: 16px;
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .24em;
  line-height: 1.8;
  color: var(--silver);
}
.footer__col { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; padding-top: 8px; }
.footer__label {
  margin-bottom: 10px;
  font-family: var(--font-en);
  font-size: 9px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--silver);
}
.footer__col a,
.footer__col span:not(.footer__label) {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--silver);
  line-height: 1.7;
}
.footer__col a:hover { color: var(--paper); }
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 24px;
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--silver);
}
.footer__top-link { color: var(--silver); }
.footer__top-link:hover { color: var(--paper); }
.anchor-top { position: absolute; top: 0; }

/* ---------- 404 ---------- */

.notfound {
  display: flex;
  align-items: center;
  min-height: 100svh;
  padding: calc(var(--nav-h) + 80px) 0 80px;
}
.notfound__code {
  font-family: var(--font-en);
  font-size: clamp(84px, 16vw, 220px);
  font-weight: 300;
  letter-spacing: -.04em;
  line-height: 1;
  color: var(--mist);
}
.notfound h1 { margin-top: 24px; font-family: var(--font-display); font-size: clamp(30px, 3.4vw, 46px); font-weight: 300; letter-spacing: .06em; color: var(--stone); }
.notfound p { margin-top: 16px; font-size: 15px; color: var(--gravel); }
.notfound .btn { margin-top: 36px; }

/* ---------- 动效 ---------- */

@keyframes titleIn {
  from { opacity: 0; transform: translateY(.3em); }
  to { opacity: 1; transform: none; }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}
@keyframes rowIn {
  from { opacity: 0; transform: translateX(-10px); }
  to { opacity: 1; transform: none; }
}
@keyframes livePulse {
  0%, 100% { box-shadow: 0 0 0 3px var(--accent-dim); }
  50% { box-shadow: 0 0 0 7px rgba(10, 224, 192, .045); }
}

.js .hero__title span {
  animation: titleIn .95s var(--ease-out) both;
}
.js .hero__title span:nth-child(1) { animation-delay: .08s; }
.js .hero__title span:nth-child(2) { animation-delay: .16s; }

.js .hero__copy > .eyebrow,
.js .hero__sub,
.js .hero__desc,
.js .hero__actions,
.js .hero__meta {
  animation: fadeUp .85s var(--ease-out) both;
}
.js .hero__copy > .eyebrow { animation-delay: .04s; }
.js .hero__sub { animation-delay: .28s; }
.js .hero__desc { animation-delay: .34s; }
.js .hero__actions { animation-delay: .4s; }
.js .hero__meta { animation-delay: .48s; }

.is-ready .answer__row {
  animation: rowIn .7s var(--ease-out) both;
}
.is-ready .answer__row:nth-child(1) { animation-delay: .32s; }
.is-ready .answer__row:nth-child(2) { animation-delay: .39s; }
.is-ready .answer__row:nth-child(3) { animation-delay: .46s; }
.is-ready .answer__row:nth-child(4) { animation-delay: .53s; }
.is-ready .answer__sources,
.is-ready .answer__foot {
  animation: fadeUp .7s var(--ease-out) both;
}
.is-ready .answer__sources { animation-delay: .58s; }
.is-ready .answer__foot { animation-delay: .64s; }
.answer__live i { animation: livePulse 2.8s ease-in-out infinite; }

.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .75s var(--ease-out), transform .75s var(--ease-out);
  transition-delay: var(--delay, 0s);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

.progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: 200;
  pointer-events: none;
  opacity: .75;
}

.case-row__title { transition: transform .5s var(--ease); }
.case-row:hover .case-row__title { transform: translateX(5px); }
.more-case__num { transition: transform .6s var(--ease); }
.more-case:hover .more-case__num { transform: translateY(-3px); }
.cta__glyph { will-change: transform; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js [data-reveal] { opacity: 1; transform: none; }
  .js .answer { opacity: 1; transform: none; }
  .js .hero__title span,
  .js .hero__copy > .eyebrow,
  .js .hero__sub,
  .js .hero__desc,
  .js .hero__actions,
  .js .hero__meta { animation: none !important; opacity: 1; transform: none; }
  .answer__live i { animation: none !important; }
}

/* ---------- 响应式 ---------- */

@media (max-width: 1240px) {
  :root { --gutter: 64px; }
  .hero__copy { grid-column: 1 / span 7; }
  .hero__visual { grid-column: 8 / span 5; }
  .case-row { grid-template-columns: 52px 1fr 2.4fr 1.7fr 24px; }
}

@media (max-width: 1080px) {
  .hero { min-height: auto; padding: calc(var(--nav-h) + 84px) 0 72px; }
  .hero__inner { grid-template-columns: 1fr; gap: 64px; }
  .hero__copy, .hero__visual { grid-column: 1 / -1; }
  .hero__visual { justify-self: start; max-width: 520px; }
  .hero__meta { margin-top: 56px; }
  .hero__mark { height: 64vh; right: -8vw; opacity: .03; }
  .hero__title .line2 { margin-left: .5em; }

  .section__label { grid-column: 1 / -1; margin-bottom: 18px; padding-top: 0; }
  .section__title, .section__body-main, .section__body-side { grid-column: 1 / -1; }
  .section__body { display: block; }

  .method { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .method__step { padding: 28px 24px 28px 24px; border-bottom: 1px solid var(--line); min-height: auto; }
  .method__step:nth-child(2n) { border-right: 0; padding-right: 0; }
  .method__step:nth-child(2n+1) { padding-left: 0; padding-right: 24px; }

  .cap-grid { grid-template-columns: 1fr; }
  .about-split, .contact-grid { grid-template-columns: 1fr; }
  .mark-stage { min-height: 460px; }
  .mark-stage__mark { height: 300px; }

  .case-study { grid-template-columns: 1fr; gap: 36px; padding: 72px 0; }
  .case-study__meta { position: static; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 20px; }
  .case-study__industry, .case-study__period, .case-study__platforms { margin-top: 0; }
  .case-study__index { width: 100%; }

  .deliver-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .team-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__toggle { display: block; }
  .nav__inner { height: 76px; }
  :root { --nav-h: 76px; }

  .hero { padding-top: calc(var(--nav-h) + 64px); }
  .hero__title { font-size: clamp(52px, 12vw, 86px); }
  .hero__sub { margin-top: 28px; }
  .hero__actions { flex-wrap: wrap; gap: 20px; }
  .hero__meta { flex-wrap: wrap; gap: 12px 24px; }

  .section { padding: 104px 0; }
  .section__head { margin-bottom: 48px; }
  .cases-head { flex-direction: column; align-items: flex-start; gap: 20px; }
  .case-row {
    grid-template-columns: 40px 1fr;
    gap: 12px 16px;
    padding: 28px 0;
  }
  .case-row:hover { padding-left: 0; padding-right: 0; }
  .case-row__index { grid-row: 1; }
  .case-row__industry { grid-column: 2; grid-row: 1; }
  .case-row__title { grid-column: 2; grid-row: 2; }
  .case-row__metrics { grid-column: 2; grid-row: 3; flex-wrap: wrap; gap: 24px; }
  .case-row__arrow { display: none; }

  .geo-flow { grid-template-columns: 1fr; }
  .geo-flow__step { border-right: 0; border-bottom: 1px solid rgba(255, 255, 255, .12); padding: 22px 0; }
  .geo-flow__step:last-child { border-bottom: 0; }
  .geo-stat { flex-wrap: wrap; gap: 12px 20px; }
  .geo-stat__source { margin-left: 0; width: 100%; }

  .resource { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .resource__item { padding: 24px 20px 24px 20px; border-bottom: 1px solid rgba(255, 255, 255, .12); }
  .resource__item:nth-child(2n) { border-right: 0; padding-right: 0; }
  .resource__item:nth-child(2n+1) { padding-left: 0; }

  .problem-grid, .phase-grid, .principle-grid { grid-template-columns: 1fr; }
  .problem, .phase, .principle { border-right: 0; border-bottom: 1px solid var(--line); padding: 26px 0; min-height: auto; }
  .problem:last-child, .phase:last-child, .principle:last-child { border-bottom: 0; }

  .step { grid-template-columns: 54px 1fr; gap: 16px; padding: 32px 0; }
  .step__text { grid-column: 2; }
  .step__tags { grid-column: 2; }

  .more-cases { grid-template-columns: 1fr; }
  .more-case { border-right: 0; border-bottom: 1px solid var(--line); padding: 26px 0; min-height: auto; }

  .footer__top { grid-template-columns: 1fr 1fr; gap: 40px 32px; }
  .footer__brand { grid-column: 1 / -1; }

  .cta { padding: 110px 0; }
  .cta__row { flex-direction: column; align-items: flex-start; }
  .cta__actions { flex-wrap: wrap; }

  .form { padding: 26px; }
  .form__row { grid-template-columns: 1fr; }
  .form__submit { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 680px) {
  :root { --gutter: 24px; --gap: 16px; }
  .nav__inner { height: 70px; }
  :root { --nav-h: 70px; }
  .brand__mark { height: 32px; }
  .brand__name { font-size: 15px; }
  .brand__tag { font-size: 6px; }

  .hero { padding-top: calc(var(--nav-h) + 52px); }
  .hero__title { font-size: clamp(44px, 14vw, 64px); letter-spacing: .06em; }
  .hero__title .line2 { margin-left: .32em; }
  .hero__sub { font-size: 17px; }
  .hero__desc { font-size: 13px; }
  .hero__actions .btn { width: 100%; }
  .hero__actions .link-arrow { margin-left: 2px; }
  .hero__visual { max-width: 100%; }
  .answer { padding: 24px 22px 20px; }
  .answer__row--target { margin: 0 -22px; padding: 15px 22px; }
  .answer__query p { font-size: 18px; }

  .section { padding: 84px 0; }
  .section__title { font-size: clamp(28px, 8vw, 38px); }
  .lead { font-size: 17px; }
  .geo-statement { font-size: clamp(28px, 8vw, 38px); }
  .geo-stat__num { font-size: 44px; }

  .method { grid-template-columns: 1fr; }
  .method__step { border-right: 0; padding: 24px 0; }
  .method__step:nth-child(2n+1) { padding-right: 0; }

  .cap { padding: 28px 24px; min-height: auto; }
  .cap__name { font-size: 22px; }
  .cap__no { top: 26px; right: 24px; }

  .mark-stage { min-height: 400px; }
  .mark-stage__mark { height: 250px; }
  .mark-stage__label--eye { top: 32px; right: 24px; }
  .mark-stage__label--person { bottom: 34px; right: 24px; }
  .mark-stage__label--name { left: 24px; }

  .deliver-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case-metrics { grid-template-columns: 1fr; }
  .case-metric { border-right: 0; border-bottom: 1px solid var(--line); padding: 20px 0; }
  .case-metric:last-child { border-bottom: 0; }

  .page-hero { padding: calc(var(--nav-h) + 64px) 0 56px; }
  .page-hero h1 { font-size: clamp(36px, 10vw, 52px); }
  .page-hero__lead { font-size: 17px; }

  .cta { padding: 88px 0; }
  .cta__title { font-size: clamp(36px, 10vw, 50px); }

  .footer { padding: 72px 0 28px; }
  .footer__top { grid-template-columns: 1fr; gap: 36px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; gap: 10px; }

  .form { padding: 22px 18px; }
  .form__row { gap: 0; }
}


/* ---------- 补充：深色区块与 CTA 内的元素 ---------- */

.section--dark .team-grid {
  border-top-color: rgba(255, 255, 255, .16);
  border-left-color: rgba(255, 255, 255, .16);
}
.section--dark .team {
  border-right-color: rgba(255, 255, 255, .16);
  border-bottom-color: rgba(255, 255, 255, .16);
}
.section--dark .team__name { color: var(--paper); }
.section--dark .team__text { color: var(--silver); }

.link-arrow--light {
  color: var(--paper);
  border-color: rgba(255, 255, 255, .32);
}
.link-arrow--light:hover { border-color: var(--paper); }
.cta .link-arrow { color: var(--paper); border-color: rgba(255, 255, 255, .32); }
.cta .link-arrow:hover { border-color: var(--paper); }

/* ---------- 中等宽度：保持两栏首屏，避免平板上一屏过高 ---------- */
@media (min-width: 861px) and (max-width: 1080px) {
  .hero__inner {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--gap);
  }
  .hero__copy { grid-column: 1 / span 7; }
  .hero__visual { grid-column: 8 / span 5; justify-self: end; max-width: 420px; }
  .hero__title { font-size: clamp(52px, 6.2vw, 74px); }
  .hero__title .line2 { margin-left: .5em; }
  .hero__sub { font-size: 18px; }
  .hero__meta { margin-top: 44px; }
  .cap-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .geo-flow { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---------- 整屏分块与自动翻页（桌面） ---------- */
@media (min-width: 1200px) {
  html.snap {
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
  }
  html.snap body { overscroll-behavior-y: contain; }

  .snap main > section {
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    scroll-snap-align: start;
    scroll-snap-stop: always;
  }
  .snap main > section.no-snap {
    min-height: auto;
    display: block;
    justify-content: initial;
    scroll-snap-align: none;
  }

  .snap .case-study {
    min-height: 100svh;
    display: grid;
    align-content: center;
    scroll-snap-align: start;
    scroll-snap-stop: always;
  }

  .snap footer {
    min-height: auto;
    display: block;
    justify-content: initial;
    scroll-snap-align: end;
    scroll-snap-stop: always;
  }
}

/* ---------- 长内容压成一屏（GEO 方法 / FAQ / 表单 / 案例） ---------- */

.steps--grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
}
.steps--grid .step {
  display: block;
  padding: 26px 24px 0 24px;
  border-right: 1px solid var(--line);
  border-bottom: 0;
}
.steps--grid .step:first-child { padding-left: 0; }
.steps--grid .step:last-child { border-right: 0; padding-right: 0; }
.steps--grid .step__num { padding-top: 0; }
.steps--grid .step__title { margin-top: 14px; font-size: 21px; }
.steps--grid .step__text { font-size: 14px; line-height: 1.85; }
.steps--grid .step__text p + p { margin-top: 8px; }
.steps--grid .step__tags { margin-top: 14px; gap: 6px; }

.section--method { padding: 88px 0; }
.section--faq { padding: 48px 0; }
.section--faq .faq summary { padding: 14px 0; font-size: 17px; }

.section--contact { padding: 88px 0 24px; }
.section--contact .form { padding: 24px; }
.section--contact .form__head { margin-bottom: 14px; padding-bottom: 10px; }
.section--contact .field { margin-bottom: 14px; }
.section--contact .field label { margin-bottom: 4px; }
.section--contact .field--consent { margin-bottom: 16px; }
.section--contact .form__row { gap: 0 20px; }

.case-study { padding: 96px 0 24px; }
.case-study__title { font-size: clamp(26px, 2.8vw, 36px); }
.case-study__body > p { margin-top: 18px; font-size: 15px; line-height: 1.9; }
.case-study__sub { margin-top: 30px; padding-top: 12px; }
.case-study__list li { padding: 6px 0 6px 20px; font-size: 13px; line-height: 1.8; }
.case-metrics { margin-top: 30px; }
.case-metric { padding: 16px 24px 16px 24px; }
.case-metric__num { font-size: clamp(30px, 3vw, 40px); }

@media (max-width: 1080px) {
  .steps--grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps--grid .step { padding: 24px 20px; border-bottom: 1px solid var(--line); }
  .steps--grid .step:nth-child(2n) { border-right: 0; }
  .steps--grid .step:nth-child(2n+1) { padding-left: 0; }
}
@media (max-width: 680px) {
  .steps--grid { grid-template-columns: 1fr; }
  .steps--grid .step { padding: 20px 0; border-right: 0; }
  .case-study { padding: 64px 0 16px; }
}

.case-section { padding: 0; }


@media (min-width: 1200px) and (max-height: 760px) {
  .hero__meta { margin-top: 48px; }
  #what { padding-top: 104px; }
  #what .geo-flow { margin-top: 24px; }
  #what .geo-stat { margin-top: 24px; }
  #what .geo-copy { line-height: 1.9; }
  #capability { padding-top: 92px; }
  #capability .section__head { margin-bottom: 8px; }
  #capability .resource { margin-top: 8px; }
  .cap { padding: 10px 38px; }
  .cap__name { margin-top: 10px; }
  .cap__text { margin-top: 10px; line-height: 1.8; }
  .resource__num { font-size: 44px; }
  .section--method { padding: 88px 0; }
  .steps--grid .step { padding-top: 20px; }
  .steps--grid .step__title { font-size: 20px; }
  .steps--grid .step__text { font-size: 13px; line-height: 1.8; }
  .case-study { padding-top: 84px; }
  .case-study__title { font-size: 32px; }
  .case-study__body > p { line-height: 1.8; }
}

/* ---------- 首页整屏目录 ---------- */
.section-menu {
  position: fixed;
  right: 26px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 80;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 13px;
}
.section-menu__label {
  writing-mode: vertical-rl;
  font-family: var(--font-en);
  font-size: 9px;
  letter-spacing: .3em;
  color: var(--gravel);
  margin-bottom: 4px;
}
.section-menu a {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gravel);
  opacity: 1;
  transition: color .3s var(--ease), opacity .3s var(--ease);
}
.section-menu a::after {
  content: "";
  width: 16px;
  height: 1px;
  background: currentColor;
  transition: width .35s var(--ease), background .35s var(--ease);
}
.section-menu a:hover { opacity: .9; }
.section-menu a.is-active { opacity: 1; color: var(--stone); }
.section-menu a.is-active::after { width: 28px; background: var(--accent); }
.section-menu.is-dark a { color: var(--silver); opacity: 1; }
.section-menu.is-dark a.is-active { color: var(--paper); }
.section-menu.is-dark .section-menu__label { color: var(--silver); }

@media (max-width: 1279px) {
  .section-menu { display: none; }
}


.section--definition .geo-copy { max-width: 900px; }
.section--definition .geo-flow { margin-top: 54px; }
.section--definition .geo-flow__step { padding-top: 28px; }