/* ==========================================================
   黑料wangw · 黑料显微镜 — 设计系统 v1.0
   概念：荧光显微档案室 / 纸感实验室
   配色：米白纸 + 电光青绿 + 光谱紫 + 荧光洋红
   ========================================================== */

/* ---------- 设计令牌 ---------- */
:root{
  --paper:#FBF6EF;
  --paper-alt:#F0FAF7;
  --paper-mint:#EFF8F5;
  --ink:#1B1B2F;
  --ink-70:rgba(27,27,47,.70);
  --ink-55:rgba(27,27,47,.55);
  --line:rgba(27,27,47,.10);
  --line-strong:rgba(27,27,47,.16);
  --cyan:#00C2A8;
  --cyan-deep:#00A38F;
  --violet:#6C4CF1;
  --magenta:#FF2E63;
  --radius-s:12px;
  --radius-m:18px;
  --radius-l:28px;
  --ease:cubic-bezier(.2,.8,.2,1);
  --shadow-soft:0 26px 44px -28px rgba(27,27,47,.45);
  --shadow-lift:0 34px 60px -34px rgba(108,76,241,.55);
}

/* 基础重置 */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x:hidden;
  color:var(--ink);
  line-height:1.65;
  font-size:16px;
  background-color:var(--paper);
  background-image:
    radial-gradient(circle at 6% -8%, rgba(0,194,168,.22) 0, transparent 42%),
    radial-gradient(circle at 97% 1%, rgba(255,46,99,.16) 0, transparent 38%),
    radial-gradient(circle at 50% 110%, rgba(108,76,241,.14) 0, transparent 46%),
    linear-gradient(rgba(27,27,47,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27,27,47,.035) 1px, transparent 1px);
  background-size:100% 100%, 100% 100%, 100% 100%, 32px 32px, 32px 32px;
  background-attachment:fixed, fixed, fixed, fixed, fixed;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

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

::selection{ background:rgba(0,194,168,.28); color:var(--ink); }

a:focus-visible,
button:focus-visible{
  outline:2px dashed var(--violet);
  outline-offset:3px;
  border-radius:6px;
}

/* 核心布局 — 必须居中 */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }

.section {
  padding:96px 0;
  position:relative;
}

.section:nth-child(even) {
  background:#F0FAF7;
  box-shadow:
    inset 0 1px 0 rgba(27,27,47,.07),
    inset 0 -1px 0 rgba(27,27,47,.07);
}

/* 导航 — 固定顶部 */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(251,246,239,.86);
  backdrop-filter:blur(16px) saturate(170%);
  -webkit-backdrop-filter:blur(16px) saturate(170%);
  border-bottom:1px solid rgba(27,27,47,.09);
}

.site-header::before{
  content:'';
  position:absolute; top:0; left:0; width:100%; height:3px;
  background:linear-gradient(90deg,
    #00C2A8 0 33.33%,
    #6C4CF1 33.33% 66.66%,
    #FF2E63 66.66% 100%);
}

.header-inner {
  display:flex; align-items:center; justify-content:space-between;
  height:68px; max-width:1200px; margin:0 auto; padding:0 24px;
}

.logo {
  display:flex; align-items:center; gap:10px;
  font-weight:800; font-size:1.18rem; letter-spacing:-.015em;
  text-decoration:none; color:var(--ink);
}

.logo-icon {
  width:36px; height:36px; border-radius:11px;
  display:flex; align-items:center; justify-content:center;
  font-size:1rem; color:#fff;
  background:linear-gradient(135deg,#00C2A8 0%,#6C4CF1 62%,#FF2E63 100%);
  box-shadow:
    0 8px 18px -10px rgba(108,76,241,.95),
    inset 0 0 0 1px rgba(255,255,255,.4);
  flex:0 0 auto;
}

.main-nav {
  display:flex; align-items:center; gap:26px; list-style:none;
}

.main-nav a {
  text-decoration:none; font-size:.885rem; font-weight:600;
  letter-spacing:.02em; color:var(--ink-70);
  position:relative; padding:6px 1px; transition:color .25s var(--ease);
}

.main-nav a::after{
  content:''; position:absolute; left:0; bottom:0;
  height:2px; width:0; border-radius:2px;
  background:linear-gradient(90deg,#00C2A8,#FF2E63);
  transition:width .3s var(--ease);
}

.main-nav a:hover{ color:var(--ink); }
.main-nav a:hover::after{ width:100%; }

.nav-cta {
  padding:10px 22px; border-radius:999px;
  color:#fff !important; font-weight:700; font-size:.86rem;
  background:var(--ink);
  box-shadow:0 10px 22px -14px rgba(27,27,47,.95);
  transition:transform .25s var(--ease), background .3s var(--ease), box-shadow .3s var(--ease);
}

.nav-cta::after{ display:none; }

.nav-cta:hover{
  transform:translateY(-2px);
  background:linear-gradient(120deg,#00C2A8,#6C4CF1);
  box-shadow:0 14px 26px -14px rgba(108,76,241,.95);
}

.menu-toggle {
  display:none;
  width:42px; height:42px; border-radius:12px;
  align-items:center; justify-content:center;
  background:#fff; border:1px solid var(--line-strong);
  color:var(--ink); font-size:1.1rem; cursor:pointer;
  transition:.25s var(--ease);
}

.menu-toggle:hover{ border-color:var(--violet); color:var(--violet); }

/* 首页Hero */
.hero {
  min-height:78vh; display:flex; align-items:center;
  padding:158px 0 96px;
  position:relative;
  isolation:isolate;
}

.hero::before{
  content:'';
  position:absolute; z-index:-1;
  right:4%; top:20%;
  width:320px; height:320px; border-radius:50%;
  border:1px dashed rgba(108,76,241,.35);
  background:
    radial-gradient(circle, rgba(0,194,168,.10) 0 32%, transparent 33%),
    radial-gradient(circle, rgba(255,46,99,.08) 0 58%, transparent 59%);
  animation:lensSpin 40s linear infinite;
}

.hero::after{
  content:'';
  position:absolute; z-index:-1;
  left:-60px; bottom:8%;
  width:180px; height:180px; border-radius:50%;
  background:radial-gradient(circle at 35% 35%, rgba(0,194,168,.28), rgba(0,194,168,0) 70%);
  filter:blur(6px);
}

@keyframes lensSpin{
  from{ transform:rotate(0deg); }
  to{ transform:rotate(360deg); }
}

.hero-content { max-width:760px; position:relative; }

.hero-eyebrow {
  display:inline-block; font-size:.76rem; font-weight:800;
  letter-spacing:.22em; text-transform:uppercase;
  padding:7px 16px; border-radius:999px; margin-bottom:20px;
  color:var(--cyan-deep);
  background:rgba(0,194,168,.10);
  border:1px solid rgba(0,194,168,.35);
}

.hero h1 {
  font-size:clamp(2.35rem, 6.2vw, 4.35rem);
  line-height:1.06; letter-spacing:-.035em;
  font-weight:800; margin-bottom:24px;
}

.hero h1 strong{
  font-weight:800;
  background:linear-gradient(115deg,#00A38F 0%,#6C4CF1 55%,#FF2E63 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}

.hero p {
  font-size:clamp(1rem,1.5vw,1.12rem);
  color:var(--ink-70); max-width:580px; margin-bottom:36px;
}

.hero-buttons { display:flex; gap:14px; flex-wrap:wrap; }

.hero-image {
  border-radius:var(--radius-m); overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-soft);
}

.hero-image img { width:100%; height:auto; }

/* 按钮 */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 30px; border-radius:999px;
  font-weight:700; font-size:.95rem; letter-spacing:.01em;
  cursor:pointer; border:none; text-decoration:none;
  transition:transform .28s var(--ease), box-shadow .28s var(--ease),
             background .28s var(--ease), color .28s var(--ease), border-color .28s var(--ease);
}

.btn-primary {
  color:#fff;
  background:linear-gradient(120deg,#00C2A8 0%,#6C4CF1 100%);
  box-shadow:0 16px 30px -18px rgba(108,76,241,.95);
}

.btn-primary:hover{
  transform:translateY(-3px);
  box-shadow:0 24px 40px -20px rgba(108,76,241,1);
}

.btn-outline {
  background:transparent;
  border:1.5px solid var(--ink);
  color:var(--ink);
}

.btn-outline:hover{
  background:var(--ink); color:#fff;
  transform:translateY(-3px);
  box-shadow:0 18px 30px -20px rgba(27,27,47,.9);
}

/* 标签/标题 */
.section-label {
  display:inline-block; font-size:.76rem; font-weight:800;
  letter-spacing:.26em; text-transform:uppercase;
  color:var(--cyan-deep); margin-bottom:14px;
  position:relative; padding-left:26px;
}

.section-label::before{
  content:'';
  position:absolute; left:0; top:50%; transform:translateY(-50%);
  width:16px; height:2px; border-radius:2px;
  background:linear-gradient(90deg,#00C2A8,#FF2E63);
}

.section-title {
  font-size:clamp(1.6rem, 3.4vw, 2.5rem);
  font-weight:800; letter-spacing:-.028em; line-height:1.16;
  margin-bottom:16px;
}

.section-desc {
  max-width:620px; font-size:1.02rem;
  color:var(--ink-70); margin-bottom:44px;
}

/* 卡片网格 */
.cards-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
  gap:24px;
}

.category-card {
  border-radius:var(--radius-m); padding:30px 26px 26px;
  background:#fff;
  border:1px solid var(--line);
  position:relative; overflow:hidden;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}

.category-card::before{
  content:'';
  position:absolute; left:0; bottom:0; height:3px; width:0;
  background:linear-gradient(90deg,#00C2A8,#6C4CF1 55%,#FF2E63);
  transition:width .38s var(--ease);
}

.category-card:hover {
  transform:translateY(-6px);
  border-color:rgba(108,76,241,.34);
  box-shadow:var(--shadow-soft);
}

.category-card:hover::before{ width:100%; }

.card-icon {
  width:52px; height:52px; border-radius:16px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:18px; font-size:1.35rem;
  color:var(--ink);
  background:linear-gradient(140deg, rgba(0,194,168,.18), rgba(108,76,241,.14));
  border:1px solid rgba(27,27,47,.06);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.7);
}

.card-link {
  display:inline-flex; align-items:center; gap:6px;
  font-weight:700; font-size:.85rem;
  color:var(--violet); text-decoration:none;
  transition:gap .25s var(--ease), color .25s var(--ease);
}

.card-link::after{ content:'→'; transition:transform .25s var(--ease); }
.card-link:hover{ color:var(--magenta); gap:10px; }

/* 特性块 */
.feature-block {
  display:grid; grid-template-columns:1fr 1fr;
  gap:56px; align-items:center;
}

.feature-image {
  border-radius:var(--radius-m); overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-soft);
}

.feature-image img { width:100%; height:auto; }

.feature-text { position:relative; }

.feature-text .section-title{ margin-bottom:18px; }

.feature-list { list-style:none; margin-top:22px; }

.feature-list li {
  padding:9px 0; display:flex; align-items:center; gap:12px;
  font-size:.98rem; color:var(--ink-70);
}

.feature-list li::before {
  content:'✓';
  flex:0 0 auto;
  width:22px; height:22px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:.72rem; font-weight:800;
  color:var(--cyan-deep);
  background:rgba(0,194,168,.14);
  border:1px solid rgba(0,194,168,.3);
}

/* 数据条 */
.stats-bar {
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:24px; text-align:center;
}

.stat-item {
  padding:30px 20px; border-radius:var(--radius-m);
  border:1px solid var(--line); background:#fff;
  position:relative; overflow:hidden;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease);
}

.stat-item::after{
  content:'';
  position:absolute; top:0; left:50%; transform:translateX(-50%);
  width:40px; height:3px; border-radius:0 0 4px 4px;
  background:linear-gradient(90deg,#00C2A8,#6C4CF1,#FF2E63);
}

.stat-item:hover{ transform:translateY(-5px); box-shadow:var(--shadow-soft); }

.stat-number {
  font-size:clamp(1.9rem,3.6vw,2.6rem);
  font-weight:800; letter-spacing:-.035em; line-height:1.1;
  background:linear-gradient(120deg,#00A38F 0%,#6C4CF1 65%,#FF2E63 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}

.stat-label {
  font-size:.85rem; color:var(--ink-55);
  margin-top:8px; letter-spacing:.12em;
}

/* 内容墙 */
.content-wall {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:24px;
}

.content-wall-item {
  border-radius:var(--radius-m); overflow:hidden;
  border:1px solid var(--line); background:#fff;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}

.content-wall-item:hover {
  transform:translateY(-6px);
  border-color:rgba(255,46,99,.28);
  box-shadow:var(--shadow-soft);
}

.content-wall-item img {
  width:100%; height:200px; object-fit:cover;
  transition:transform .6s var(--ease);
}

.content-wall-item:hover img{ transform:scale(1.06); }

.content-wall-body { padding:22px 20px; }

.content-wall-body h3{ letter-spacing:-.015em; margin-bottom:8px; }
.content-wall-body p{ font-size:.92rem; color:var(--ink-70); }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }

.faq-item {
  border:1px solid var(--line); border-radius:16px;
  background:#fff; margin-bottom:10px; overflow:hidden;
  cursor:pointer;
  transition:border-color .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
}

.faq-item:hover{ border-color:rgba(108,76,241,.35); }

.faq-item .faq-question {
  padding:18px 22px; font-weight:700; font-size:1rem;
  display:flex; justify-content:space-between; align-items:center; gap:16px;
}

.faq-item .faq-answer {
  padding:0 22px 18px;
  display:none; color:var(--ink-70); font-size:.95rem;
}

.faq-item.open {
  background:linear-gradient(180deg,#fff, #F7FDFB);
  border-color:rgba(0,194,168,.45);
  box-shadow:0 20px 40px -32px rgba(0,194,168,.9);
}

.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner {
  padding:64px 32px; text-align:center;
  border-radius:var(--radius-l); color:#fff;
  position:relative; overflow:hidden;
  background:linear-gradient(120deg,#00C2A8 0%, #2F9FD8 38%, #6C4CF1 78%, #FF2E63 130%);
  box-shadow:0 46px 90px -56px rgba(108,76,241,1);
}

.cta-banner::before{
  content:'';
  position:absolute; inset:0;
  background-image:radial-gradient(rgba(255,255,255,.28) 1px, transparent 1px);
  background-size:22px 22px;
  opacity:.5;
  pointer-events:none;
}

.cta-banner::after{
  content:'';
  position:absolute; right:-80px; top:-80px;
  width:280px; height:280px; border-radius:50%;
  border:1px solid rgba(255,255,255,.35);
  box-shadow:inset 0 0 0 34px rgba(255,255,255,.08);
  pointer-events:none;
}

.cta-banner h2 {
  color:#fff; font-size:clamp(1.5rem,3vw,2.3rem);
  font-weight:800; letter-spacing:-.025em; line-height:1.2;
  margin-bottom:14px; position:relative; z-index:1;
}

.cta-banner p{ position:relative; z-index:1; opacity:.9; margin-bottom:28px; }

.cta-banner .btn-primary {
  background:#fff; color:var(--ink);
  position:relative; z-index:1;
  box-shadow:0 20px 36px -22px rgba(27,27,47,.7);
}

.cta-banner .btn-primary:hover{
  background:#1B1B2F; color:#fff;
}

/* 页脚 */
.site-footer {
  padding:64px 0 28px;
  background:var(--paper-mint);
  border-top:1px solid var(--line);
  position:relative;
}

.site-footer::before{
  content:'';
  position:absolute; top:-1px; left:0; width:100%; height:3px;
  background:linear-gradient(90deg,
    #FF2E63 0 25%,
    #6C4CF1 25% 50%,
    #00C2A8 50% 75%,
    #1B1B2F 75% 100%);
  opacity:.75;
}

.site-footer .container { position:relative; }

.footer-grid {
  display:grid; grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
}

.footer-brand { font-size:.94rem; color:var(--ink-70); }

.footer-brand .logo{ margin-bottom:14px; }

.footer-col h4{
  font-size:.82rem; font-weight:800; letter-spacing:.18em;
  text-transform:uppercase; color:var(--ink);
  margin-bottom:16px;
}

.footer-col a{
  display:block; text-decoration:none; font-size:.92rem;
  color:var(--ink-70); padding:5px 0;
  transition:color .2s var(--ease), transform .2s var(--ease);
}

.footer-col a:hover{ color:var(--violet); transform:translateX(4px); }

.footer-bottom {
  border-top:1px solid rgba(27,27,47,.12);
  margin-top:44px; padding-top:22px;
  text-align:center; font-size:.85rem;
  color:var(--ink-55);
}

/* 工具类 */
.text-accent { color:var(--violet); }

.text-center { text-align:center; }

.seo-description {
  max-width:640px; margin:0 auto 48px;
  color:var(--ink-70); font-size:1rem;
}

.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* ⚠️ 响应式 */
@media (max-width: 980px){
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
}

@media (max-width: 768px) {
  .section{ padding:72px 0; }
  .feature-block { grid-template-columns:1fr; gap:36px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .hero{ padding:132px 0 72px; min-height:auto; }
  .hero::before{ width:220px; height:220px; right:-60px; top:12%; }

  .main-nav { display:none; }

  .menu-toggle {
    display:flex;
  }

  .main-nav.open {
    display:flex; flex-direction:column; align-items:flex-start;
    position:absolute; top:68px; left:0; width:100%;
    background:rgba(255,255,255,.97);
    backdrop-filter:blur(14px);
    padding:20px 24px 26px; gap:14px;
    border-bottom:1px solid var(--line);
    box-shadow:0 26px 40px -30px rgba(27,27,47,.7);
  }

  .main-nav.open a{ font-size:1rem; }

  .main-nav.open .nav-cta{ margin-top:6px; }
}

@media (max-width: 480px) {
  .cards-grid,.content-wall,.stats-bar { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; }
  .hero-buttons { flex-direction:column; align-items:stretch; }
  .hero-buttons .btn{ justify-content:center; }
  .container{ padding:0 18px; }
  .cta-banner{ padding:48px 20px; border-radius:22px; }
}