/* ==========================================================================
   Beacon GEO — 信标 GEO 设计系统
   风格：简洁大气 · 编辑杂志感 · 生成式引擎优化行业属性
   ========================================================================== */

/* ---------- 1. Design tokens ---------- */
:root {
  /* 色彩 */
  --paper: #FAFAF7;          /* 页面底色（暖白） */
  --paper-2: #F2F1EB;        /* 浅色区块 */
  --white: #FFFFFF;
  --ink: #0E1C2C;            /* 主文字（深墨蓝黑） */
  --ink-2: #12324C;          /* 深色渐变端色 */
  --ink-soft: #46586B;       /* 次级文字 */
  --ink-faint: #5E6E7D;      /* 弱化文字（浅底 AA） */
  --ink-hover: #1A2E44;      /* 深色按钮悬停 */
  --teal: #0E9384;           /* 品牌主强调色 */
  --teal-dark: #0B7367;      /* 深档（白字达标） */
  --teal-deeper: #095F55;    /* 按钮悬停深档 */
  --teal-bright: #5FD0C2;    /* 深底品牌亮色 */
  --teal-tint: #E4F2EF;
  --teal-line: #BFE0DB;      /* 品牌浅描边 */
  --teal-wash: #F4FAF8;      /* 品牌极浅底 */
  --amber: #C9963C;          /* 引用高亮色 */
  --amber-tint: #F7EEDC;
  --amber-dark: #8A6420;     /* 琥珀深档（白字达标） */
  --amber-line: #E8D5AE;
  --line: #E4E3DC;           /* 细分隔线 */
  --line-strong: #D4D3CB;

  /* 圆角与阴影 */
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(14, 28, 44, .05), 0 2px 8px rgba(14, 28, 44, .04);
  --shadow-md: 0 6px 24px rgba(14, 28, 44, .08), 0 2px 6px rgba(14, 28, 44, .05);

  /* 字体 */
  --font-serif: "Fraunces", "Noto Serif SC", "Songti SC", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", "Segoe UI", sans-serif;

  /* 动效 */
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 2. Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
/* 原生滚动条零占位（Firefox 用 scrollbar-width，Chromium/WebKit 用 ::-webkit-scrollbar）：
   视口内容区 = 完整窗口宽，内容带由 margin:auto 相对窗口几何居中，两侧留白数学上恒等，
   在任何浏览器、分辨率、系统缩放、有无滚动条下均无条件成立；
   滚轮 / 触摸板 / 键盘滚动与 sticky 头部完全不受影响 */
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: clip; scrollbar-width: none; }
html::-webkit-scrollbar { width: 0; height: 0; }
body {
  margin: 0;
  overflow-x: clip;
  scrollbar-width: none;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body::-webkit-scrollbar { width: 0; height: 0; }
img, svg { display: block; max-width: 100%; }
a { color: var(--teal-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { margin: 0 0 .6em; line-height: 1.28; font-weight: 500; letter-spacing: -.01em; }
h1, h2, h3 { font-family: var(--font-serif); }
h1 { font-size: clamp(2.1rem, 4.6vw, 3.3rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); }
h3 { font-size: 1.22rem; }
p { margin: 0 0 1em; }
strong, b { font-weight: 600; }
ul, ol { padding-left: 1.2em; }
::selection { background: var(--teal-tint); }
:focus-visible { outline: 2px solid var(--teal-dark); outline-offset: 2px; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 999;
  background: var(--ink); color: #fff; padding: .6rem 1rem; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- 3. Layout helpers ---------- */
.container { width: min(1200px, 92%); margin: 0 auto; }
.container--narrow { width: min(860px, 92%); margin: 0 auto; }

/* 大屏渐进加宽：避免宽屏下内容带过窄、两侧空旷 */
@media (min-width: 1440px) {
  .container { width: min(1240px, 90%); }
  .container--narrow { width: min(960px, 80%); }
}
@media (min-width: 1920px) {
  .container { width: min(1360px, 86%); }
  .container--narrow { width: min(1040px, 72%); }
}
.section { padding: 5.5rem 0; }
.section--tint { background: var(--paper-2); }
.section--ink { background: var(--ink); color: #EDF2F6; }
.section--ink h2, .section--ink h3 { color: #fff; }
.section--tight { padding: 3.5rem 0; }
.section-head { max-width: 720px; margin-bottom: 3rem; }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: .78rem; font-weight: 600; letter-spacing: .14em;
  text-transform: uppercase; color: var(--teal-dark);
  margin-bottom: .9rem;
}
.section--ink .eyebrow { color: var(--teal-bright); }
.lead { font-size: 1.12rem; color: var(--ink-soft); }
.section--ink .lead { color: #B9C6D2; }
.text-center { text-align: center; }

.grid { display: grid; gap: 1.6rem; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 4rem; align-items: center; }
.split--reverse .split__media { order: -1; }

/* ---------- 4. Header / navigation ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250, 250, 247, .86);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand__name { display: flex; flex-direction: column; line-height: 1.1; font-weight: 600; font-size: 1.05rem; }
.brand__sub {
  font-family: var(--font-sans); font-size: .66rem; font-weight: 500;
  letter-spacing: .16em; text-transform: uppercase; color: var(--ink-faint); margin-top: .22rem;
}
.nav__links { display: flex; gap: 1.6rem; list-style: none; margin: 0; padding: 0; }
.nav__links a {
  color: var(--ink); font-size: .92rem; font-weight: 500; padding: .4rem 0;
  border-bottom: 2px solid transparent; transition: border-color .2s;
}
.nav__links a:hover { border-bottom-color: var(--teal); text-decoration: none; }
.nav__links a[aria-current="page"] { border-bottom-color: var(--teal); }
.nav__actions { display: flex; align-items: center; gap: 1rem; }
.lang-switch {
  display: inline-flex; align-items: center; border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill); padding: .18rem; font-size: .8rem; background: var(--white);
}
.lang-switch a { padding: .28rem .7rem; border-radius: var(--radius-pill); color: var(--ink-soft); font-weight: 500; }
.lang-switch a:hover { text-decoration: none; color: var(--ink); }
.lang-switch a.is-active { background: var(--ink); color: #fff; }
.nav__toggle {
  display: none; width: 40px; height: 40px; border: 1px solid var(--line-strong);
  border-radius: 10px; background: var(--white); cursor: pointer; padding: 10px 9px;
}
.nav__toggle span { display: block; height: 2px; background: var(--ink); margin: 4px 0; border-radius: 2px; }

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-family: var(--font-sans); font-size: .94rem; font-weight: 600;
  padding: .78rem 1.5rem; border-radius: var(--radius-pill);
  border: 1px solid transparent; cursor: pointer;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background .18s, color .18s;
  text-decoration: none; white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(.98); }
.btn--primary { background: var(--teal-dark); color: #fff; box-shadow: 0 4px 14px rgba(11, 115, 103, .26); }
.btn--primary:hover { background: var(--teal-deeper); }
.btn--ink { background: var(--ink); color: #fff; }
.btn--ink:hover { background: var(--ink-hover); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--ink); }
.btn--light { background: #fff; color: var(--ink); }
.btn--small { padding: .55rem 1.1rem; font-size: .86rem; }
.btn--text {
  padding: 0; border: 0; background: none; color: var(--teal-dark);
  font-size: .92rem; font-weight: 600; display: inline-flex; align-items: center; gap: .35rem;
}
.btn--text .arrow { transition: transform .2s var(--ease); }
.btn--text:hover .arrow { transform: translateX(3px); }

/* ---------- 6. Hero ---------- */
.hero { padding: 4.5rem 0 5rem; overflow: hidden; }
.hero__grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 3.5rem; align-items: center; }
.hero h1 { margin-bottom: 1.2rem; }
.hero h1 .mark { position: relative; white-space: nowrap; }
.hero h1 .mark::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: .06em; height: .34em;
  background: var(--teal-tint); z-index: -1; border-radius: 4px;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: .9rem; margin: 1.8rem 0 1.2rem; }
.hero__note { font-size: .86rem; color: var(--ink-faint); }

/* --- AI 回答模拟卡（核心视觉） --- */
.answer-card {
  position: relative; background: var(--white); border: 1px solid var(--line);
  border-radius: 20px; padding: 1.4rem 1.4rem 1.2rem; box-shadow: var(--shadow-md);
}
.answer-card__q {
  display: inline-block; background: var(--ink); color: #fff;
  font-size: .88rem; padding: .6rem 1rem; border-radius: 14px 14px 14px 4px;
  margin-bottom: 1rem; max-width: 88%;
}
.answer-card__a {
  border: 1px solid var(--line); background: var(--paper);
  border-radius: 14px 14px 4px 14px; padding: 1rem 1.1rem;
}
.answer-card__head {
  display: flex; align-items: center; gap: .45rem;
  font-size: .74rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-faint); margin-bottom: .55rem;
}
.answer-card__head::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--teal);
  box-shadow: 0 0 0 3px var(--teal-tint);
}
.answer-card__a p { font-size: .92rem; color: var(--ink-soft); margin-bottom: .9rem; }
.answer-card__a p:last-child { margin-bottom: 0; }
.hl {
  background: linear-gradient(transparent 62%, var(--amber-tint) 62%);
  font-weight: 600; color: var(--ink); padding: 0 .1em; border-radius: 2px;
}
.src-row { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .75rem; }
.src-pill {
  font-size: .74rem; padding: .28rem .65rem; border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong); color: var(--ink-faint); background: var(--white);
}
.src-pill.is-cited {
  border-color: var(--teal); color: var(--teal-dark); background: var(--teal-tint);
  font-weight: 600;
}
.answer-card__badge {
  position: absolute; top: -14px; right: 18px;
  background: var(--amber-dark); color: #fff; font-size: .74rem; font-weight: 700;
  letter-spacing: .06em; padding: .35rem .8rem; border-radius: var(--radius-pill);
  box-shadow: 0 4px 12px rgba(138, 100, 32, .3);
}
.answer-card__foot { font-size: .78rem; color: var(--ink-faint); margin-top: .9rem; text-align: right; }

/* ---------- 7. Platform wall ---------- */
.platform-wall { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 1.6rem 0; background: var(--white); }
.platform-wall__label { font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); text-align: center; margin-bottom: 1rem; }
.pill-row { display: flex; flex-wrap: wrap; justify-content: center; gap: .6rem; }
.pill {
  font-size: .84rem; font-weight: 500; color: var(--ink-soft);
  border: 1px solid var(--line); background: var(--paper);
  padding: .38rem .9rem; border-radius: var(--radius-pill);
}
.pill--teal { color: var(--teal-dark); border-color: var(--teal-line); background: var(--teal-tint); font-weight: 600; }

/* ---------- 8. Cards ---------- */
.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.8rem 1.7rem; box-shadow: var(--shadow-sm);
  transition: transform .22s var(--ease), box-shadow .22s var(--ease);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.card h3 { margin-bottom: .55rem; }
.card p { color: var(--ink-soft); font-size: .95rem; }
.card p:last-child { margin-bottom: 0; }
.card__icon {
  width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center;
  justify-content: center; margin-bottom: 1.1rem; background: var(--teal-tint); color: var(--teal-dark);
}
.card__num {
  font-family: var(--font-serif); font-size: .95rem; font-weight: 600; color: var(--teal-dark);
  display: block; margin-bottom: .7rem; letter-spacing: .06em;
}
.card--ink { background: var(--ink); border-color: var(--ink); color: #E8EEF3; }
.card--ink h3 { color: #fff; }
.card--ink p { color: #A9B8C7; }
.card--outline { background: transparent; box-shadow: none; }

/* ---------- 9. Stats ---------- */
.stat { text-align: center; }
.stat__num { font-family: var(--font-serif); font-size: clamp(2rem, 3.4vw, 2.7rem); font-weight: 600; color: var(--teal-dark); line-height: 1.1; }
.section--ink .stat__num { color: var(--teal-bright); }
.stat__cap { font-size: .9rem; color: var(--ink-soft); margin-top: .4rem; }
.section--ink .stat__cap { color: #93A6B8; }

/* ---------- 10. Comparison table ---------- */
.compare-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
table.compare { width: 100%; border-collapse: collapse; font-size: .93rem; min-width: 640px; }
.compare th, .compare td { padding: 1rem 1.3rem; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.compare thead th { background: var(--paper-2); font-weight: 600; font-size: .86rem; letter-spacing: .04em; color: var(--ink-soft); }
.compare thead th:last-child { color: var(--teal-dark); }
.compare tbody tr:last-child td { border-bottom: 0; }
.compare td:first-child { font-weight: 600; color: var(--ink); white-space: nowrap; }
.compare td:last-child { background: var(--teal-wash); }

/* ---------- 11. Steps / timeline ---------- */
.steps { display: grid; gap: 1.2rem; counter-reset: step; }
.step {
  display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 1.4rem;
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.7rem 1.8rem; box-shadow: var(--shadow-sm);
}
.step__num {
  width: 48px; height: 48px; border-radius: 14px; background: var(--ink); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif); font-size: 1.25rem; font-weight: 600;
}
.step h3 { margin-bottom: .4rem; }
.step p { color: var(--ink-soft); font-size: .95rem; margin-bottom: .6rem; }
.step__meta { display: flex; flex-wrap: wrap; gap: .5rem; }
.tag {
  display: inline-block; font-size: .76rem; font-weight: 600; letter-spacing: .03em;
  padding: .26rem .7rem; border-radius: var(--radius-pill);
  background: var(--paper-2); color: var(--ink-soft); border: 1px solid var(--line);
}
.tag--teal { background: var(--teal-tint); color: var(--teal-dark); border-color: var(--teal-line); }
.tag--amber { background: var(--amber-tint); color: var(--amber-dark); border-color: var(--amber-line); }

/* ---------- 12. Tier cards (服务档位) ---------- */
.tier { position: relative; display: flex; flex-direction: column; }
.tier--featured { border: 2px solid var(--teal); box-shadow: var(--shadow-md); }
.tier__badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--teal-dark); color: #fff; font-size: .74rem; font-weight: 700;
  letter-spacing: .08em; padding: .3rem .85rem; border-radius: var(--radius-pill); white-space: nowrap;
}
.tier__for { font-size: .86rem; color: var(--ink-faint); margin-bottom: 1rem; }
.tier ul { list-style: none; padding: 0; margin: 0 0 1.4rem; flex: 1; }
.tier li { padding: .5rem 0 .5rem 1.7rem; position: relative; font-size: .93rem; color: var(--ink-soft); border-bottom: 1px dashed var(--line); }
.tier li:last-child { border-bottom: 0; }
.tier li::before {
  content: "✓"; position: absolute; left: 0; top: .5rem; color: var(--teal-dark);
  font-weight: 700; font-size: .9rem;
}

/* ---------- 13. Case cards ---------- */
.case-card { display: flex; flex-direction: column; gap: .9rem; }
.case-card__head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.case-card__industry { font-size: .8rem; font-weight: 600; color: var(--teal-dark); letter-spacing: .04em; }
.case-card__metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; border-top: 1px solid var(--line); padding-top: 1rem; }
.case-metric { text-align: center; }
.case-metric b { display: block; font-family: var(--font-serif); font-size: 1.35rem; color: var(--ink); line-height: 1.2; }
.case-metric span { font-size: .76rem; color: var(--ink-faint); }

/* ---------- 14. Value list / checklist ---------- */
.check-list { list-style: none; padding: 0; margin: 0; }
.check-list li { position: relative; padding: .55rem 0 .55rem 2rem; color: var(--ink-soft); font-size: .96rem; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: .72rem; width: 18px; height: 18px;
  border-radius: 50%; background: var(--teal-tint);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%230B7367' stroke-width='4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center;
}
.warn-list { list-style: none; padding: 0; margin: 0; }
.warn-list li { position: relative; padding: .55rem 0 .55rem 2rem; color: var(--ink-soft); font-size: .96rem; }
.warn-list li::before {
  content: "✕"; position: absolute; left: .25rem; top: .55rem; color: #C0574F; font-weight: 700; font-size: .95rem;
}

/* ---------- 15. Prose (文章类页面) ---------- */
.prose { font-size: 1rem; color: var(--ink-soft); }
.prose h2 { color: var(--ink); margin-top: 2.4em; font-size: 1.5rem; }
.prose h3 { color: var(--ink); margin-top: 1.8em; }
.prose li { margin-bottom: .4em; }
.prose strong { color: var(--ink); }

/* ---------- 16. FAQ accordion ---------- */
.faq { display: grid; gap: .8rem; }
.faq details {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 0 1.4rem; transition: border-color .2s;
}
.faq details[open] { border-color: var(--teal); }
.faq summary {
  cursor: pointer; list-style: none; padding: 1.15rem 0; font-weight: 600; color: var(--ink);
  display: flex; justify-content: space-between; align-items: center; gap: 1rem; font-size: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; font-family: var(--font-serif); font-size: 1.4rem; color: var(--teal);
  transition: transform .2s var(--ease); line-height: 1;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details > p { margin: 0 0 1.2rem; color: var(--ink-soft); font-size: .95rem; }

/* ---------- 17. Forms ---------- */
.form { display: grid; gap: 1.1rem; }
.form-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1.1rem; }
.form label { font-size: .88rem; font-weight: 600; color: var(--ink); display: block; margin-bottom: .4rem; }
.form input, .form select, .form textarea {
  width: 100%; padding: .8rem 1rem; border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  font-family: var(--font-sans); font-size: .95rem; background: var(--white); color: var(--ink);
  transition: border-color .2s, box-shadow .2s;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none; border-color: var(--teal); box-shadow: 0 0 0 3px var(--teal-tint);
}
.form textarea { min-height: 130px; resize: vertical; }
.form__hint { font-size: .82rem; color: var(--ink-faint); }
.form__note {
  display: none; background: var(--teal-tint); border: 1px solid var(--teal-line); color: var(--teal-dark);
  border-radius: var(--radius-sm); padding: .9rem 1.1rem; font-size: .9rem;
}
.form__note.is-visible { display: block; }

/* ---------- 18. Page hero (内页) ---------- */
.page-hero { padding: 4rem 0 3.5rem; border-bottom: 1px solid var(--line); background: var(--white); }
.page-hero h1 { max-width: 820px; }
.page-hero .lead { max-width: 720px; margin-bottom: 0; }
.breadcrumbs { list-style: none; display: flex; gap: .5rem; padding: 0; margin: 0 0 1.2rem; font-size: .82rem; color: var(--ink-faint); }
.breadcrumbs li + li::before { content: "/"; margin-right: .5rem; color: var(--line-strong); }
.breadcrumbs a { color: var(--ink-faint); }
.breadcrumbs a:hover { color: var(--teal-dark); }

/* ---------- 19. CTA band ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--ink) 0%, var(--ink-2) 100%);
  color: #fff; border-radius: 24px; padding: 3.5rem 3rem; text-align: center;
  position: relative; overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 82% 18%, rgba(14, 147, 132, .35), transparent 46%),
              radial-gradient(circle at 12% 88%, rgba(201, 150, 60, .18), transparent 40%);
  pointer-events: none;
}
.cta-band > * { position: relative; }
.cta-band h2 { color: #fff; }
.cta-band p { color: #B9C6D2; max-width: 560px; margin: 0 auto 1.8rem; }

/* ---------- 20. Footer ---------- */
.site-footer { background: var(--ink); color: #A9B8C7; margin-top: 5rem; padding: 4rem 0 2rem; font-size: .92rem; }
.site-footer h4 { color: #fff; font-family: var(--font-sans); font-size: .82rem; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 1rem; }
.footer__grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.2fr); gap: 2.5rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: .5rem; }
.site-footer a { color: #A9B8C7; }
.site-footer a:hover { color: #fff; }
.footer__brand { display: flex; align-items: center; gap: .6rem; color: #fff; font-weight: 600; margin-bottom: .9rem; }
.footer__disclaimer { border-top: 1px solid rgba(255, 255, 255, .1); margin-top: 3rem; padding-top: 1.6rem; font-size: .82rem; color: #7D8C9C; }
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, .1); margin-top: 1.4rem; padding-top: 1.4rem;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; font-size: .82rem;
}
.footer__bottom nav { display: flex; flex-wrap: wrap; gap: 1.2rem; }

/* ---------- 21. Reveal animation ---------- */
html.js .reveal { opacity: 0; transition: opacity .5s var(--ease); }
html.js .reveal.is-visible { opacity: 1; }
@media (prefers-reduced-motion: reduce) {
  html.js .reveal { opacity: 1; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 22. Responsive ---------- */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero__grid { grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
  .split { grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
  .split--reverse .split__media { order: 0; }
}
@media (max-width: 860px) {
  .nav__links {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    flex-direction: column; gap: 0; padding: .6rem 4%;
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { display: block; padding: .8rem 0; border-bottom: 1px solid var(--line); }
  .nav__links li:last-child a { border-bottom: 0; }
  .nav__toggle { display: block; }
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .section { padding: 4rem 0; }
  .step { grid-template-columns: 1fr; gap: .9rem; }
  .compare th, .compare td { padding: .8rem 1rem; }
  .cta-band { padding: 2.5rem 1.5rem; }
  .form-row { grid-template-columns: minmax(0, 1fr); }
  .hero { padding: 3rem 0 3.5rem; }
}
@media (max-width: 560px) {
  .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .case-card__metrics { grid-template-columns: minmax(0, 1fr); gap: .5rem; }
  .lang-switch { display: none; }
}