/* ==========================================================================
   伯赛思 BERSEIS — 品牌站点样式表
   静态站点，无构建依赖；全部字体使用系统字体栈
   ========================================================================== */

:root {
  /* 色板 */
  --ink:        #0E1A16;
  --ink-2:      #33413C;
  --ink-3:      #5D6D67;
  --muted:      #8A9791;
  --line:       #E3E7E3;
  --line-2:     #EDEFEC;
  --paper:      #FFFFFF;
  --sand:       #F6F5F1;
  --sand-2:     #EFEEE8;
  --forest:     #0B332A;
  --forest-3:   #1C5245;
  --jade:       #23B183;
  --jade-soft:  #D8F0E6;

  /* 字体 */
  --sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Consolas, "Liberation Mono", monospace;

  /* 栅格 */
  --wrap: 1200px;

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

/* ---------- Reset ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-2);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p, figure, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: var(--jade); color: #fff; }

/* ---------- 布局 ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 32px; }
.section { padding: 100px 0; position: relative; }
.section--tight { padding: 72px 0; }
.section--sand { background: var(--sand); }
.section--hair { border-top: 1px solid var(--line); }

.grid { display: grid; gap: 24px; }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 文字 ---------- */
.display {
  font-size: clamp(32px, 4.4vw, 54px);
  line-height: 1.16;
  letter-spacing: -.025em;
  font-weight: 600;
  color: var(--ink);
}
.h2 {
  font-size: clamp(24px, 2.8vw, 36px);
  line-height: 1.28;
  letter-spacing: -.02em;
  font-weight: 600;
  color: var(--ink);
}
.h3 {
  font-size: 18px;
  line-height: 1.5;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--ink);
}
.lead {
  font-size: clamp(15.5px, 1.25vw, 17.5px);
  line-height: 1.9;
  color: var(--ink-2);
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.dim { color: var(--ink-3); }
.small { font-size: 13.5px; line-height: 1.75; }
.mono { font-family: var(--mono); }

.sec-head { max-width: 720px; margin-bottom: 52px; }
.sec-head .eyebrow { margin-bottom: 18px; }
.sec-head .lead { margin-top: 18px; }

/* ---------- 按钮与链接 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  height: 48px; padding: 0 24px;
  border-radius: 2px;
  font-size: 14.5px; font-weight: 500;
  background: var(--forest); color: #fff;
  transition: background .3s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 15px; height: 15px; flex: none; }
.btn:hover { background: var(--forest-3); }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14.5px; font-weight: 500; color: var(--ink);
  padding-bottom: 4px; border-bottom: 1px solid var(--ink);
  transition: gap .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
}
.link-arrow:hover { gap: 14px; color: var(--jade); border-color: var(--jade); }
.link-arrow svg { width: 14px; height: 14px; }

.link-arrow--light { color: #fff; border-color: rgba(255,255,255,.45); }
.link-arrow--light:hover { color: var(--jade); border-color: var(--jade); }

/* ---------- 页头 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 90;
  background: rgba(255,255,255,.94);
  backdrop-filter: saturate(1.6) blur(12px);
  border-bottom: 1px solid var(--line-2);
}
.site-header .wrap {
  height: 76px;
  display: flex; align-items: center; justify-content: space-between; gap: 28px;
}

.logo { display: flex; align-items: center; flex: none; }
.logo img { height: 46px; width: auto; display: block; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav a {
  position: relative;
  padding: 10px 14px;
  font-size: 14.5px; color: var(--ink-2);
  transition: color .25s var(--ease);
}
.nav a::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px;
  height: 1px; background: var(--ink); transform: scaleX(0);
  transform-origin: left; transition: transform .32s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after { transform: scaleX(1); }
.nav a.is-active { color: var(--ink); font-weight: 500; }
.nav a.is-active::after { transform: scaleX(1); background: var(--jade); height: 2px; }

.nav-toggle {
  display: none; width: 42px; height: 42px;
  align-items: center; justify-content: center;
  border: 1px solid var(--line); border-radius: 2px;
}
.nav-toggle span { display: block; width: 16px; height: 1px; background: var(--ink); position: relative; transition: .3s; }
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 16px; height: 1px; background: var(--ink);
  transition: .3s var(--ease);
}
.nav-toggle span::before { top: -5px; }
.nav-toggle span::after { top: 5px; }
body.nav-open .nav-toggle span { background: transparent; }
body.nav-open .nav-toggle span::before { transform: translateY(5px) rotate(45deg); }
body.nav-open .nav-toggle span::after { transform: translateY(-5px) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--forest);
  color: #fff;
}
.hero__bg { position: absolute; inset: 0; z-index: -1; }
.hero__bg img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: center 52%;
  filter: saturate(.95);
}
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(8,38,31,.93) 0%, rgba(8,38,31,.82) 42%, rgba(8,38,31,.48) 76%, rgba(8,38,31,.28) 100%),
    linear-gradient(180deg, rgba(8,38,31,.55) 0%, rgba(8,38,31,0) 34%, rgba(8,38,31,.3) 100%);
}
.hero__inner {
  position: relative;
  padding-top: 132px;
  padding-bottom: 116px;
  min-height: 540px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero .display, .hero__sub, .hero__actions, .hero__links { max-width: 720px; }
.hero .display { color: #fff; }
.hero__sub {
  margin-top: 26px; max-width: 34em;
  font-size: clamp(15px, 1.2vw, 17px); line-height: 1.9; color: #D3E0DC;
  text-shadow: 0 1px 22px rgba(4,24,19,.55);
}
.hero__links { display: flex; gap: 34px; margin-top: 40px; flex-wrap: wrap; }
.hero__actions { margin-top: 40px; }

/* ---------- 页面页头（子页） ---------- */
.page-hero {
  padding: 78px 0 70px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #FBFAF7, #fff);
}
.page-hero .display { font-size: clamp(28px, 3.4vw, 44px); }
.page-hero .lead { margin-top: 20px; max-width: 42em; }
.crumb {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .12em;
  color: var(--ink-3); margin-bottom: 24px; display: flex; gap: 8px;
}
.crumb a:hover { color: var(--ink); }

/* ---------- 产品首屏 ---------- */
.p-hero { padding: 70px 0 0; background: linear-gradient(180deg, #FAF9F6, #fff); }
.p-hero__grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(36px, 5vw, 76px); align-items: start;
  padding-bottom: 76px;
}
.p-hero__model {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .22em;
  color: var(--jade); display: block; margin-bottom: 20px;
}
.p-hero .display { font-size: clamp(28px, 3.4vw, 44px); }
.p-hero__sub { margin-top: 24px; font-size: 16px; line-height: 1.95; color: var(--ink-2); max-width: 32em; }
.p-hero__note {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .1em;
  color: var(--ink-3); margin-top: 14px; text-transform: uppercase;
}

/* ---------- 产品外观图 ---------- */
.p-hero__visual { aspect-ratio: 4 / 3; }
.p-hero__visual img {
  width: 100%; height: 100%; object-fit: contain;
  mix-blend-mode: multiply;
}

/* ---------- 卡片 ---------- */
.card {
  background: #fff;
  border: 1px solid var(--line);
  padding: 32px 28px;
  transition: border-color .35s var(--ease);
}
.card:hover { border-color: #CFD8D2; }
.card__num {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .14em;
  color: var(--jade); margin-bottom: 16px; display: block;
}
.card h3 { font-size: 17px; font-weight: 600; color: var(--ink); margin-bottom: 10px; }
.card p { font-size: 14px; line-height: 1.8; color: var(--ink-3); }

/* 产品卡片（首页） */
.pcard { display: block; background: #fff; border: 1px solid var(--line); transition: border-color .35s var(--ease); }
.pcard:hover { border-color: #CFD8D2; }
.pcard__media { background: #F7F7F4; overflow: hidden; }
.pcard__media img {
  width: 100%; aspect-ratio: 4 / 3; object-fit: contain;
  mix-blend-mode: multiply;
  transition: transform 1.2s var(--ease);
}
.pcard:hover .pcard__media img { transform: scale(1.02); }
.pcard__body { padding: 30px 32px 34px; }
.pcard__body h3 { font-size: 22px; font-weight: 600; color: var(--ink); margin-top: 8px; }
.pcard__body p { margin-top: 12px; font-size: 14.5px; line-height: 1.8; color: var(--ink-3); }
.pcard__more {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 20px; font-size: 14px; color: var(--ink);
  border-bottom: 1px solid var(--line);
  transition: gap .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
}
.pcard__more svg { width: 13px; height: 13px; }
.pcard:hover .pcard__more { gap: 11px; color: var(--jade); border-color: var(--jade); }

/* ---------- 图文分栏 ---------- */
.split {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(36px, 5vw, 80px);
  align-items: center;
}
.split--wide { grid-template-columns: 1.12fr .88fr; }
.split--top { align-items: start; }
.split__body .eyebrow { margin-bottom: 18px; }
.split__body .lead + .lead { margin-top: 16px; }
.split__body .lead + .link-arrow { margin-top: 28px; }

/* ---------- 面板 / 信息表 ---------- */
.panel {
  border: 1px solid var(--line); background: #fff;
  padding: clamp(24px, 3vw, 36px);
}
.panel__title {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-3); margin-bottom: 22px;
  display: flex; justify-content: space-between; gap: 16px;
}
.spec-list { border-top: 1px solid var(--line); }
.spec-list li {
  display: flex; justify-content: space-between; gap: 24px;
  padding: 15px 0; border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.spec-list li span:first-child { color: var(--ink-3); flex: none; }
.spec-list li span:last-child { color: var(--ink); text-align: right; }

/* ---------- 应用方向 ---------- */
.applist { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.applist li {
  padding: 26px 28px;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
}
.applist li:nth-child(3n+1) { padding-left: 0; }
.applist li:nth-child(3n) { border-right: 0; }
.applist strong { display: block; font-size: 15.5px; font-weight: 600; color: var(--ink); }
.applist span { display: block; margin-top: 6px; font-size: 13.5px; line-height: 1.7; color: var(--ink-3); }


/* ---------- 文献卡片 ---------- */
.lit-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.lit-card {
  display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line);
  padding: 26px 24px 20px;
  transition: border-color .35s var(--ease), transform .35s var(--ease), box-shadow .35s var(--ease);
}
.lit-card:hover {
  border-color: #C9D4CE; transform: translateY(-3px);
  box-shadow: 0 20px 38px -30px rgba(14,26,22,.55);
}
.lit-card__top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-bottom: 18px;
}
.lit-card__tag {
  font-size: 12px; line-height: 1; padding: 6px 10px;
  background: var(--jade-soft); color: #0D6B4E;
  border-radius: 2px; white-space: nowrap;
}
.lit-card__journal {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .03em;
  color: #7E8D88; text-align: right; line-height: 1.4;
}
.lit-card__title {
  font-size: 14.5px; font-weight: 600; line-height: 1.55;
  color: var(--ink); letter-spacing: -.005em;
}
.lit-card__cn {
  margin-top: 10px; font-size: 13px; line-height: 1.7;
  color: var(--ink-3); flex: 1;
}
.lit-card__foot {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-top: 18px; padding-top: 14px;
  border-top: 1px solid var(--line-2);
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .06em;
  color: var(--ink-3);
}
.lit-card__foot span:last-child { color: var(--ink-2); transition: color .25s; }
.lit-card:hover .lit-card__foot span:last-child { color: var(--jade); }

/* ---------- 说明 ---------- */
.note {
  border-left: 2px solid var(--jade); padding: 2px 0 2px 18px;
  font-size: 13.5px; line-height: 1.8; color: var(--ink-3);
}

/* ---------- 联系行 ---------- */
.contact-line {
  display: flex; align-items: center; justify-content: space-between;
  gap: 28px; flex-wrap: wrap;
  padding: 32px 0;
  border-top: 1px solid var(--line);
}
.contact-line p { font-size: 15px; color: var(--ink-3); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(40px, 6vw, 88px); }
.info-block { border-top: 1px solid var(--line); padding-top: 24px; margin-top: 30px; }
.info-block h3 {
  font-size: 12px; font-family: var(--mono); letter-spacing: .14em;
  text-transform: uppercase; color: var(--muted); font-weight: 400; margin-bottom: 14px;
}
.info-row { display: flex; gap: 18px; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.info-row span:first-child { color: var(--ink-3); width: 52px; flex: none; font-size: 13.5px; }
.info-row a:hover { color: var(--jade); }

.form { display: flex; flex-direction: column; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label { font-size: 13px; color: var(--ink-3); }
.field input, .field textarea {
  font: inherit; font-size: 14.5px; color: var(--ink);
  padding: 12px 14px; border: 1px solid var(--line); border-radius: 2px;
  background: #fff; transition: border-color .25s, box-shadow .25s;
}
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--jade); box-shadow: 0 0 0 3px rgba(35,177,131,.12);
}
.field textarea { resize: vertical; min-height: 110px; }
.form__foot { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-top: 4px; }
.form__hint { font-size: 12px; color: var(--muted); line-height: 1.6; }

/* ---------- 按钮变体 ---------- */
.btn--light { background: #fff; color: var(--forest); }
.btn--light:hover { background: var(--jade); color: #fff; }
.btn--ghost {
  background: transparent; color: #fff;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.32);
}
.btn--ghost:hover { background: #fff; color: var(--forest); box-shadow: none; }
.btn--line {
  background: transparent; color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--line);
}
.btn--line:hover { background: var(--ink); color: #fff; box-shadow: none; }
.hero__actions, .page-hero__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 38px; }

/* ---------- 标签 ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 20px; }
.chip {
  font-size: 12.5px; line-height: 1; padding: 7px 11px;
  border: 1px solid var(--line); border-radius: 2px;
  color: var(--ink-3); background: #fff;
}
.chip--jade { background: var(--jade-soft); border-color: transparent; color: #0D6B4E; }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 11px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--jade);
}
.badge::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: currentColor; }

/* ---------- 区块头（右侧带链接） ---------- */
.sec-head--row {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 36px; max-width: none; margin-bottom: 48px;
}
.sec-head--row .sec-head__text { max-width: 680px; }
.sec-head--row .sec-head__text .eyebrow { margin-bottom: 18px; }
.sec-head--row .sec-head__text .lead { margin-top: 18px; }

/* ---------- 产品大块（产品中心） ---------- */
.prod {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(36px, 5vw, 72px); align-items: center;
  padding: 64px 0; border-top: 1px solid var(--line);
}
.prod:first-of-type { border-top: 0; padding-top: 0; }
.prod--rev .prod__media { order: 2; }
.prod__media { background: #F7F7F4; overflow: hidden; }
.prod__media img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; mix-blend-mode: multiply; }
.prod__body .eyebrow { margin-bottom: 16px; }
.prod__body .h2 { font-size: clamp(24px, 2.6vw, 34px); }
.prod__body p { margin-top: 18px; font-size: 15px; line-height: 1.9; color: var(--ink-3); max-width: 34em; }
.prod__body .link-arrow { margin-top: 28px; }


/* ---------- 建库流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--line); }
.steps > div { padding: 26px 22px 4px 0; border-right: 1px solid var(--line); }
.steps > div:last-child { border-right: 0; }
.steps i {
  font-family: var(--mono); font-style: normal; font-size: 11.5px;
  letter-spacing: .14em; color: var(--jade);
}
.steps h4 { margin: 12px 0 6px; font-size: 15.5px; font-weight: 600; color: var(--ink); }
.steps p { font-size: 13px; line-height: 1.7; color: var(--ink-3); }

/* ---------- 应用领域 ---------- */
.domains { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.domains > li {
  padding: 26px 24px; border-bottom: 1px solid var(--line); border-right: 1px solid var(--line);
  display: flex; flex-direction: column;
}
.domains > li:nth-child(4n+1) { padding-left: 0; }
.domains > li:nth-child(4n) { border-right: 0; }
.domains strong { font-size: 15.5px; font-weight: 600; color: var(--ink); }
.domains p { margin-top: 6px; font-size: 13.5px; line-height: 1.7; color: var(--ink-3); flex: 1; }
.domains em {
  font-style: normal; margin-top: 14px;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em;
  color: #0D6B4E;
}



/* ---------- 页头右侧操作区 ---------- */
.header__right { display: flex; align-items: center; gap: 18px; }
.btn--quote { height: 40px; padding: 0 20px; font-size: 14px; }
.btn--quote svg { width: 14px; height: 14px; }
.quote-cta { margin-top: 26px; width: 100%; justify-content: center; }

/* ---------- 报价表单 ---------- */
.quote { background: var(--sand-2); border-top: 1px solid var(--line); }
.quote__inner { max-width: 760px; margin: 0 auto; text-align: center; }
.quote__inner .h2 { font-size: clamp(24px, 2.6vw, 34px); }
.quote__sub { margin-top: 16px; font-size: 15.5px; line-height: 1.85; color: var(--ink-3); }
.quote-form { margin-top: 38px; display: flex; flex-direction: column; gap: 16px; text-align: left; }
.quote-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.quote-form .field label { font-size: 13.5px; color: var(--ink-3); }
.quote-form .field label b { color: var(--jade); font-weight: 400; margin-left: 2px; }
.quote-form .field input {
  height: 48px; font-size: 15px; background: #fff;
}
.quote-form .btn { width: 100%; height: 54px; justify-content: center; font-size: 15px; margin-top: 10px; }
.quote__note { margin-top: 16px; font-size: 12.5px; line-height: 1.7; color: var(--muted); }

/* ---------- 提交成功弹窗 ---------- */
.modal {
  position: fixed; inset: 0; z-index: 200;
  display: none; align-items: center; justify-content: center;
  padding: 24px; background: rgba(11,51,42,.46);
}
.modal.is-open { display: flex; }
.modal__dialog {
  width: 100%; max-width: 420px; background: #fff;
  padding: 40px 34px 32px; text-align: center;
  box-shadow: 0 30px 70px -30px rgba(0,0,0,.45);
  animation: modalIn .32s var(--ease);
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(12px) scale(.98); }
  to { opacity: 1; transform: none; }
}
.modal__icon {
  width: 56px; height: 56px; margin: 0 auto 20px; border-radius: 50%;
  background: var(--jade-soft); color: #0D6B4E;
  display: flex; align-items: center; justify-content: center;
}
.modal__icon svg { width: 26px; height: 26px; }
.modal h3 { font-size: 20px; font-weight: 600; color: var(--ink); }
.modal p { margin-top: 10px; font-size: 14px; line-height: 1.75; color: var(--ink-3); }
.modal .btn { width: 100%; justify-content: center; margin-top: 26px; }
body.modal-open { overflow: hidden; }

/* ---------- 页脚 ---------- */
.site-footer { background: #081F19; color: #8FA6A0; padding: 64px 0 0; font-size: 13.5px; }
.footer__top {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px; padding-bottom: 46px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer__brand .logo img { height: 38px; }
.footer__brand p { margin-top: 20px; max-width: 26em; line-height: 1.9; color: #7E958F; }
.site-footer h5 {
  font-family: var(--mono); font-size: 12px; letter-spacing: .14em;
  text-transform: uppercase; color: #8AA39C; margin: 0 0 18px; font-weight: 400;
}
.site-footer li { margin-bottom: 11px; }
.site-footer a { transition: color .2s; }
.site-footer a:hover { color: var(--jade); }
.footer__contact li { display: flex; gap: 12px; line-height: 1.8; }
.footer__contact li span:first-child { color: #4E6C65; flex: none; width: 34px; }
.footer__bottom {
  display: flex; justify-content: space-between; align-items: center;
  gap: 24px; padding: 24px 0 28px;
  font-size: 13px; color: #6E8781; flex-wrap: wrap;
}
.footer__bottom .mono { letter-spacing: .1em; }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: .08s; }
.reveal[data-d="2"] { transition-delay: .16s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .section { padding: 80px 0; }
  .nav { display: none; }
  .header__right { display: none; }
  .nav-toggle { display: flex; }
  .applist { grid-template-columns: repeat(2, 1fr); }
  .applist li:nth-child(3n+1) { padding-left: 28px; }
  .applist li:nth-child(3n) { border-right: 1px solid var(--line); }
  .applist li:nth-child(2n+1) { padding-left: 0; }
  .applist li:nth-child(2n) { border-right: 0; }
  .footer__top { grid-template-columns: 1fr 1fr; }

  .domains { grid-template-columns: repeat(2, 1fr); }
  .domains > li:nth-child(4n+1) { padding-left: 24px; }
  .domains > li:nth-child(4n) { border-right: 1px solid var(--line); }
  .domains > li:nth-child(2n+1) { padding-left: 0; }
  .domains > li:nth-child(2n) { border-right: 0; }
  .lit-grid { grid-template-columns: repeat(2, 1fr); }
  .sec-head--row { flex-direction: column; align-items: flex-start; gap: 22px; }
}

@media (max-width: 900px) {
  .wrap { padding: 0 22px; }
  .hero__inner { padding-top: 76px; padding-bottom: 72px; min-height: 0; }
  .cols-2, .cols-3, .cols-4 { grid-template-columns: 1fr; }
  .split, .split--wide, .p-hero__grid, .contact-grid, .prod { grid-template-columns: 1fr; }
  .prod--rev .prod__media { order: 0; }
  .prod { padding: 48px 0; gap: 30px; }
  .p-hero__grid { padding-bottom: 52px; }
  .contact-line { align-items: flex-start; }
}

@media (max-width: 640px) {
  body { font-size: 15px; }
  .section { padding: 62px 0; }
  .section--tight { padding: 48px 0; }
  .sec-head { margin-bottom: 36px; }
  .hero .display { font-size: clamp(28px, 8vw, 38px); }
  .hero__links { gap: 22px; margin-top: 32px; }
  .hero__actions .btn, .page-hero__actions .btn { width: 100%; justify-content: center; }
  .card { padding: 24px 22px; }
  .card h3 { font-size: 16px; }
  .card p { font-size: 13.5px; }
  .quote-form__row { grid-template-columns: 1fr; }
  .domains { grid-template-columns: 1fr; }
  .domains > li { border-right: 0 !important; padding-left: 0 !important; }
  .lit-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .steps > div { border-right: 0; border-bottom: 1px solid var(--line); padding: 22px 0; }
  .steps > div:last-child { border-bottom: 0; }
  .applist { grid-template-columns: 1fr; }
  .applist li { border-right: 0 !important; padding-left: 0 !important; }
  .figure-slot { aspect-ratio: 3 / 2; }
  .page-hero { padding: 52px 0 44px; }
  .footer__top { grid-template-columns: 1fr; gap: 30px; padding-bottom: 36px; }
  .btn { width: 100%; justify-content: center; }
}

/* 移动端抽屉 */
.mobile-nav {
  position: fixed; inset: 0 0 auto 0; top: 0; z-index: 120;
  background: #fff; padding: 24px 22px 34px;
  transform: translateY(-100%); transition: transform .42s var(--ease);
  box-shadow: 0 20px 50px -20px rgba(14,26,22,.4);
  max-height: 100vh; overflow-y: auto;
}
body.nav-open .mobile-nav { transform: translateY(0); }
.mobile-nav__top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.mobile-nav__logo { height: 26px; width: auto; display: block; }
.mobile-nav__close { width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 2px; font-size: 18px; color: var(--ink); }
.mobile-nav a.m-link {
  display: flex; justify-content: space-between; align-items: center;
  padding: 17px 0; border-bottom: 1px solid var(--line);
  font-size: 16.5px; color: var(--ink);
}
.mobile-nav a.m-link span { font-family: var(--mono); font-size: 11.5px; color: var(--ink-3); letter-spacing: .12em; }
body.nav-locked { overflow: hidden; }
body.nav-open::after {
  content: ""; position: fixed; inset: 0; z-index: 110;
  background: rgba(11,51,42,.45);
}