/* ============================================================
   Skincodis Biotech 官网 — 设计系统 / Design System
   视觉风格参考 crisbio.com.cn：固定顶栏 + 下拉导航 + 中/EN 切换
   配色：生命科技青绿 (teal) + 高级感暖金 (gold)
   ============================================================ */

:root {
  /* 品牌色 */
  --primary: #0E7E74;          /* 主青绿 */
  --primary-dark: #0A5750;     /* 深青绿 */
  --primary-darker: #073e39;
  --primary-light: #E6F4F1;    /* 浅青底 */
  --accent: #C9A24B;           /* 暖金（高级感点缀） */
  --accent-soft: #F3E9D2;

  /* 文字 */
  --ink: #0E2A2E;              /* 深墨绿（标题） */
  --text: #2E4347;             /* 正文 */
  --muted: #5E7174;            /* 次要文字 */
  --line: #E4ECEA;             /* 分割线 */

  /* 背景 */
  --bg: #FFFFFF;
  --bg-soft: #F5F8F8;
  --bg-dark: #0A2A2E;

  /* 尺寸 */
  --maxw: 1200px;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 10px 30px rgba(14, 60, 55, .08);
  --shadow-lg: 0 18px 50px rgba(14, 60, 55, .14);
  --nav-h: 70px;

  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
          "Inter", "Helvetica Neue", Arial, system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px;
  font-size: 15px; font-weight: 600; cursor: pointer;
  border: 1.5px solid transparent; transition: all .25s ease;
  font-family: var(--font);
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-gold { background: var(--accent); color: #2a230f; }
.btn-gold:hover { background: #b98f3c; transform: translateY(-2px); }
.btn-ghost { background: transparent; border-color: rgba(255,255,255,.55); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-outline { background: #fff; border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); }

/* ---------- 顶部导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h);
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
  z-index: 1000;
}
.nav-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 11px; }
.brand .logo {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 17px;
  box-shadow: 0 4px 12px rgba(14,126,116,.35);
}
.brand .name { font-weight: 800; font-size: 17px; color: var(--ink); letter-spacing: .3px; }
.brand .name small { display: block; font-size: 11px; font-weight: 600; color: var(--muted); letter-spacing: 1.5px; }

.menu { display: flex; align-items: center; gap: 4px; }
.menu > li { position: relative; }
.menu > li > a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 16px; border-radius: 8px; font-weight: 600; font-size: 15px;
  color: var(--text); transition: all .2s;
}
.menu > li > a:hover, .menu > li.active > a { color: var(--primary); background: var(--primary-light); }

/* 下拉菜单（参考 crisbio 技术服务多级导航） */
.dropdown { position: absolute; top: calc(100% + 8px); left: 0; min-width: 250px;
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow-lg); padding: 8px; opacity: 0; visibility: hidden;
  transform: translateY(8px); transition: all .22s ease; }
.menu > li:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a { display: block; padding: 11px 14px; border-radius: 8px; font-size: 14.5px; font-weight: 500; color: var(--text); }
.dropdown a:hover { background: var(--primary-light); color: var(--primary); }
.dropdown a span { display: block; font-size: 12px; color: var(--muted); font-weight: 400; margin-top: 2px; }

/* 语言切换：两个独立按钮 */
.lang { display: flex; align-items: center; gap: 8px; }
.lang .lang-btn { display: inline-flex; align-items: center; justify-content: center; padding: 8px 16px; border-radius: 999px; font-size: 13.5px; font-weight: 700; cursor: pointer; color: var(--muted); background: #fff; border: 1px solid var(--line); transition: all .2s ease; font-family: var(--font); }
.lang .lang-btn:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-light); }
.lang .lang-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 24px; height: 2.5px; background: var(--ink); border-radius: 2px; transition: .3s; }

/* ---------- HERO ---------- */
.hero {
  position: relative; margin-top: var(--nav-h);
  background: radial-gradient(1200px 500px at 75% -10%, rgba(14,126,116,.35), transparent 60%),
              linear-gradient(135deg, #073e39 0%, #0A5750 55%, #0E7E74 100%);
  color: #fff; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 26px 26px; opacity: .5; pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; padding: 92px 0 104px; display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; }
.hero .eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 700; letter-spacing: 1.5px;
  color: var(--accent); background: rgba(201,162,75,.12); padding: 7px 15px; border-radius: 999px; }
.hero h1 { font-size: 46px; line-height: 1.2; margin: 22px 0 18px; font-weight: 800; letter-spacing: .5px; }
.hero h1 .hl { color: var(--accent); }
.hero p.lead { font-size: 17.5px; color: rgba(255,255,255,.85); max-width: 540px; }
.hero .cta { margin-top: 32px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 30px; margin-top: 40px; }
.hero-stats .num { font-size: 30px; font-weight: 800; color: #fff; }
.hero-stats .lbl { font-size: 13px; color: rgba(255,255,255,.7); }

/* HERO 右侧细胞示意卡 */
.hero-card {
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16);
  border-radius: 18px; padding: 26px; backdrop-filter: blur(4px);
}
.hero-card h3 { font-size: 16px; color: #fff; margin-bottom: 16px; display:flex; align-items:center; gap:8px; }
.cell-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 5px rgba(201,162,75,.2); }
.hero-card ul li { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,.1); font-size: 14.5px; color: rgba(255,255,255,.9); }
.hero-card ul li:last-child { border-bottom: 0; }
.hero-card ul li i { color: var(--accent); font-style: normal; font-size: 13px; }

/* ---------- 子页面横幅（统一，用于解决方案/产品/AI/联系） ---------- */
.page-banner {
  margin-top: var(--nav-h);
  background: radial-gradient(1000px 420px at 72% -20%, rgba(14,126,116,.40), transparent 60%),
              linear-gradient(135deg, #073e39 0%, #0A5750 55%, #0E7E74 100%);
  color: #fff; text-align: center; padding: 72px 0 62px; overflow: hidden;
}
.page-banner .container { position: relative; z-index: 2; }
.page-banner .tag { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px;
  color: var(--accent); text-transform: uppercase; }
.page-banner .tag::before, .page-banner .tag::after { content: ""; display: inline-block; width: 26px; height: 1.5px;
  background: var(--accent); vertical-align: middle; margin: 0 10px; }
.page-banner h1 { font-size: 40px; font-weight: 800; margin: 16px 0 12px; letter-spacing: .5px; }
.page-banner p { color: rgba(255,255,255,.82); font-size: 16.5px; max-width: 640px; margin: 0 auto; }

/* ---------- 区块通用 ---------- */
section.block { padding: 86px 0; }
section.block.soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 50px; }
.section-head .tag { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px; color: var(--primary); text-transform: uppercase; }
.section-head .tag::before, .section-head .tag::after { content: ""; display: inline-block; width: 26px; height: 1.5px; background: var(--accent); vertical-align: middle; margin: 0 10px; }
.section-head h2 { font-size: 33px; color: var(--ink); font-weight: 800; margin: 14px 0 12px; }
.section-head p { color: var(--muted); font-size: 16px; }

/* ---------- 关于（主页企业介绍） ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-grid .media {
  border-radius: 18px; min-height: 360px; position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--primary-light), #fff);
  border: 1px solid var(--line); display: grid; place-items: center;
}
.about-grid .media .badge { text-align: center; padding: 30px; }
.about-grid .media .badge .big { font-size: 64px; font-weight: 800; color: var(--primary); letter-spacing: 1px; }
.about-grid .media .badge .sub { color: var(--muted); font-weight: 600; letter-spacing: 3px; }
.about-text h3 { font-size: 24px; color: var(--ink); margin-bottom: 16px; }
.about-text p { color: var(--text); margin-bottom: 14px; }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.about-tags span { background: var(--primary-light); color: var(--primary-dark); padding: 8px 15px; border-radius: 999px; font-size: 13.5px; font-weight: 600; }

/* ---------- 解决方案 ---------- */
.sol-tabs { display: flex; justify-content: center; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.sol-tab { background: #fff; border: 1.5px solid var(--line); color: var(--text); padding: 12px 22px; border-radius: 999px; font-weight: 700; cursor: pointer; font-size: 15px; font-family: var(--font); transition: all .2s; }
.sol-tab.active { background: var(--primary); border-color: var(--primary); color: #fff; box-shadow: var(--shadow); }

.sol-panel { display: none; }
.sol-panel.active { display: block; animation: fade .4s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.sol-hero { display: grid; grid-template-columns: .9fr 1.1fr; gap: 36px; align-items: center; margin-bottom: 38px;
  background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 34px; box-shadow: var(--shadow); }
.sol-hero .icon-box { width: 92px; height: 92px; border-radius: 20px; background: var(--primary-light); display: grid; place-items: center; font-size: 42px; margin-bottom: 18px; }
.sol-hero h3 { font-size: 26px; color: var(--ink); margin-bottom: 12px; }
.sol-hero p { color: var(--muted); }

.sol-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.sol-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; transition: all .25s; }
.sol-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.sol-card .ic { width: 46px; height: 46px; border-radius: 12px; background: var(--primary-light); color: var(--primary); display: grid; place-items: center; font-size: 22px; margin-bottom: 14px; }
.sol-card h4 { font-size: 17px; color: var(--ink); margin-bottom: 8px; }
.sol-card p { font-size: 14px; color: var(--muted); }
.sol-card .chips { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 7px; }
.sol-card .chips span { font-size: 12px; background: var(--bg-soft); color: var(--primary-dark); padding: 4px 10px; border-radius: 6px; font-weight: 600; }

/* ---------- 产品中心 ---------- */
.prod-filter { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 36px; }
.prod-filter button { background: #fff; border: 1.5px solid var(--line); color: var(--text); padding: 9px 18px; border-radius: 999px; font-weight: 600; font-size: 14px; cursor: pointer; font-family: var(--font); transition: .2s; }
.prod-filter button.active { background: var(--ink); border-color: var(--ink); color: #fff; }

.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.prod-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: all .25s; display: flex; flex-direction: column; }
.prod-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.prod-card .thumb { height: 150px; display: grid; place-items: center; font-size: 40px; position: relative; }
.prod-card .thumb.blue { background: linear-gradient(135deg, #E6F4F1, #d3ebe7); }
.prod-card .thumb.white { background: linear-gradient(135deg, #f4f7f7, #e9eeee); }
.prod-card .cat { position: absolute; top: 12px; left: 12px; background: rgba(10,42,46,.78); color: #fff; font-size: 11.5px; font-weight: 700; padding: 4px 11px; border-radius: 999px; }
.prod-card .body { padding: 18px 20px 22px; flex: 1; display: flex; flex-direction: column; }
.prod-card .body h4 { font-size: 16.5px; color: var(--ink); margin-bottom: 10px; }
.prod-card .meta { font-size: 13px; color: var(--muted); margin-bottom: 6px; display: flex; gap: 7px; }
.prod-card .meta b { color: var(--primary-dark); font-weight: 700; min-width: 58px; }
.prod-card .pkg { margin-top: auto; font-size: 12.5px; color: var(--muted); background: var(--bg-soft); padding: 8px 12px; border-radius: 8px; }

/* ---------- AI 代理采购 ---------- */
.ai-wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: start; }
.ai-panel { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 34px; box-shadow: var(--shadow); }
.ai-panel h3 { font-size: 22px; color: var(--ink); margin-bottom: 8px; }
.ai-panel p.sub { color: var(--muted); margin-bottom: 22px; font-size: 14.5px; }
.ai-input-row { display: flex; gap: 12px; }
.ai-input-row textarea { flex: 1; min-height: 110px; resize: vertical; border: 1.5px solid var(--line); border-radius: 12px; padding: 14px 16px; font-family: var(--font); font-size: 15px; color: var(--text); outline: none; transition: .2s; }
.ai-input-row textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 4px var(--primary-light); }
.ai-btns { display: flex; flex-direction: column; gap: 12px; min-width: 120px; }
.ai-email-row { margin-top: 16px; }
.ai-email-row label { display: block; font-size: 13.5px; font-weight: 700; color: var(--ink); margin-bottom: 7px; }
.ai-email-row input { width: 100%; max-width: 420px; border: 1.5px solid var(--line); border-radius: 12px; padding: 12px 16px; font-family: var(--font); font-size: 15px; color: var(--text); outline: none; transition: .2s; }
.ai-email-row input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px var(--primary-light); }
.ai-btns .btn { justify-content: center; width: 100%; }

.ai-result { margin-top: 22px; border-radius: 12px; padding: 18px 20px; font-size: 14.5px; display: none; }
.ai-result.show { display: block; animation: fade .35s ease; }
.ai-result.analyze { background: var(--primary-light); border: 1px solid #c7e6e0; }
.ai-result.analyze h5 { color: var(--primary-dark); margin-bottom: 10px; font-size: 15px; }
.ai-result.confirm { background: #eafaf0; border: 1px solid #bfe9cf; }
.ai-result.confirm h5 { color: #1c7a45; margin-bottom: 8px; font-size: 15px; }
.ai-result ul { margin: 6px 0 0 18px; list-style: disc; color: var(--text); }
.ai-result ul li { margin-bottom: 5px; }
.ai-tagrow { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }
.ai-tagrow span { background: #fff; border: 1px solid #c7e6e0; color: var(--primary-dark); font-size: 12.5px; padding: 4px 11px; border-radius: 999px; font-weight: 600; }

.ai-side { background: linear-gradient(160deg, var(--primary-dark), var(--primary)); color: #fff; border-radius: 18px; padding: 32px; }
.ai-side h3 { font-size: 19px; margin-bottom: 14px; }
.ai-side ul li { display: flex; gap: 11px; padding: 11px 0; border-bottom: 1px solid rgba(255,255,255,.14); font-size: 14.5px; }
.ai-side ul li:last-child { border-bottom: 0; }
.ai-side ul li .step { width: 26px; height: 26px; flex: none; border-radius: 50%; background: var(--accent); color: #2a230f; display: grid; place-items: center; font-weight: 800; font-size: 13px; }
.ai-email { margin-top: 22px; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2); border-radius: 12px; padding: 16px 18px; }
.ai-email .lbl { font-size: 12.5px; color: rgba(255,255,255,.75); }
.ai-email .val { font-size: 16px; font-weight: 700; word-break: break-all; }
.ai-email .promise { margin-top: 10px; font-size: 13px; color: var(--accent); font-weight: 600; }

/* ---------- 联系方式 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 34px; box-shadow: var(--shadow); }
.contact-info h3 { font-size: 22px; color: var(--ink); margin-bottom: 20px; }
.contact-info .row { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.contact-info .row:last-child { border-bottom: 0; }
.contact-info .row .ic { width: 42px; height: 42px; flex: none; border-radius: 11px; background: var(--primary-light); color: var(--primary); display: grid; place-items: center; font-size: 19px; }
.contact-info .row .k { font-size: 13px; color: var(--muted); }
.contact-info .row .v { font-size: 15.5px; color: var(--ink); font-weight: 600; }
.contact-map { border-radius: 18px; overflow: hidden; border: 1px solid var(--line); min-height: 360px; background:
   linear-gradient(135deg, #e9f2f0, #dcebe8); display: grid; place-items: center; position: relative; }
.contact-map .pin { text-align: center; color: var(--primary-dark); }
.contact-map .pin .dot { width: 18px; height: 18px; border-radius: 50%; background: var(--accent); margin: 0 auto 8px; box-shadow: 0 0 0 7px rgba(201,162,75,.25); }
.contact-map .pin .addr { font-weight: 700; font-size: 16px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--bg-dark); color: rgba(255,255,255,.78); padding: 60px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; }
.footer .brand .name { color: #fff; }
.footer .brand .name small { color: rgba(255,255,255,.5); }
.footer p.desc { margin-top: 16px; font-size: 14px; color: rgba(255,255,255,.6); max-width: 320px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer ul li { margin-bottom: 10px; font-size: 14px; }
.footer ul li a:hover { color: var(--accent); }
.footer .bottom { margin-top: 44px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 13px; color: rgba(255,255,255,.5); }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero-inner, .about-grid, .sol-hero, .ai-wrap, .contact-grid { grid-template-columns: 1fr; }
  .sol-cards, .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 36px; }
}
@media (max-width: 720px) {
  .menu, .lang { display: none; }
  .nav-toggle { display: flex; }
  .nav.open .menu { display: flex; position: absolute; top: var(--nav-h); left: 0; right: 0; flex-direction: column;
    background: #fff; padding: 14px; border-bottom: 1px solid var(--line); box-shadow: var(--shadow-lg); gap: 2px; }
  .nav.open .lang { display: flex; position: absolute; top: calc(var(--nav-h) + 250px); right: 24px; }
  .nav.open .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; padding-left: 14px; }
  .sol-cards, .prod-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .page-banner h1 { font-size: 30px; }
  .ai-input-row { flex-direction: column; }
  .ai-btns { flex-direction: row; min-width: 0; }
  .ai-btns .btn { flex: 1; }
  section.block { padding: 60px 0; }
}