/* ==========================================================================
   泗水县亿晨信息科技工作室 - 官网样式
   主题：科技简约 · 蓝白
   说明：单文件 CSS，无外部字体/图标依赖，VPS 友好
   ========================================================================== */

:root {
  --primary: #0a5cff;
  --primary-600: #0b4fd0;
  --primary-700: #0844c4;
  --accent: #38b6ff;
  --ink: #0b1b3f;
  --ink-soft: #1c2b50;
  --text: #33415c;
  --muted: #64748b;
  --bg: #ffffff;
  --bg-soft: #f4f8ff;
  --line: #e3eaf8;
  --grad: linear-gradient(120deg, #0a5cff, #38b6ff);
  --shadow-sm: 0 1px 2px rgba(11, 27, 63, .06);
  --shadow-md: 0 12px 32px rgba(11, 27, 63, .10);
  --shadow-lg: 0 24px 60px rgba(11, 27, 63, .14);
  --radius: 14px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", "Helvetica Neue", Arial, sans-serif;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-600); }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.25; margin: 0 0 .5em; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(1.9rem, 4.2vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.15rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
.container { width: min(1120px, 92vw); margin-inline: auto; }
section { padding: 84px 0; }
.section-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.section-head p { color: var(--muted); font-size: 1.05rem; }
.section-title { margin-bottom: .4em; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .82rem; font-weight: 600; color: var(--primary);
  background: rgba(10, 92, 255, .08); border: 1px solid rgba(10, 92, 255, .18);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 18px; letter-spacing: .04em;
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--grad); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-weight: 600; font-size: .98rem;
  border: 1px solid transparent; cursor: pointer; transition: all .22s ease;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 10px 24px rgba(10, 92, 255, .30); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(10, 92, 255, .38); color: #fff; }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { transform: translateY(-2px); color: var(--primary-700); box-shadow: 0 12px 26px rgba(0, 0, 0, .16); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between; height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.08rem; color: var(--ink); }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px; background: var(--grad);
  display: grid; place-items: center; color: #fff; flex: none;
  box-shadow: 0 6px 14px rgba(10, 92, 255, .32);
}
.brand-mark svg { width: 20px; height: 20px; }
.brand small { display: block; font-weight: 500; font-size: .68rem; color: var(--muted); letter-spacing: .12em; }
.menu { display: flex; align-items: center; gap: 6px; list-style: none; margin: 0; padding: 0; }
.menu a {
  display: block; padding: 8px 16px; border-radius: 999px;
  color: var(--ink-soft); font-weight: 500; font-size: .95rem;
}
.menu a:hover { background: var(--bg-soft); color: var(--primary); }
.menu a.active { color: var(--primary); background: rgba(10, 92, 255, .08); }
.menu .nav-cta { background: var(--grad); color: #fff; padding: 9px 20px; margin-left: 8px; }
.menu .nav-cta:hover { color: #fff; box-shadow: 0 8px 20px rgba(10, 92, 255, .3); }
.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer; padding: 8px;
  border-radius: 8px; color: var(--ink);
}
.nav-toggle svg { width: 24px; height: 24px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1100px 460px at 82% -10%, rgba(56, 182, 255, .18), transparent 60%),
    radial-gradient(900px 420px at 8% 10%, rgba(10, 92, 255, .10), transparent 55%),
    linear-gradient(180deg, #f8fbff, #fff 60%);
}
.hero-grid { position: absolute; inset: 0; opacity: .5; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(80% 70% at 50% 20%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(80% 70% at 50% 20%, #000 30%, transparent 100%);
}
.hero-inner {
  position: relative; display: grid; grid-template-columns: 1.05fr .95fr;
  gap: 40px; align-items: center; padding: 96px 0 88px;
}
.hero h1 { margin-bottom: 20px; }
.hero h1 .grad-text {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-desc { font-size: 1.12rem; color: var(--muted); max-width: 520px; margin-bottom: 30px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.hero-stats {
  display: flex; flex-wrap: wrap; gap: 0; list-style: none; margin: 0; padding: 0;
  border-top: 1px solid var(--line);
}
.hero-stats li { padding: 18px 28px 0 0; margin-right: 28px; }
.hero-stats strong { display: block; font-size: 1.45rem; color: var(--ink); line-height: 1.2; }
.hero-stats span { font-size: .86rem; color: var(--muted); }
.hero-visual {
  position: relative; border-radius: 22px; padding: 8px;
  background: linear-gradient(150deg, rgba(255,255,255,.9), rgba(227,234,248,.7));
  border: 1px solid rgba(227, 234, 248, .9);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(6px);
}
.hero-visual::before {
  content: ""; position: absolute; inset: -40px -40px auto auto; width: 200px; height: 200px;
  background: radial-gradient(closest-side, rgba(56,182,255,.35), transparent);
  border-radius: 50%; pointer-events: none;
}
.hero-card { position: relative; padding: 26px; border-radius: 16px; }
.hero-card h3 { font-size: 1.02rem; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.hero-card ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.hero-card li { display: flex; gap: 10px; align-items: flex-start; font-size: .94rem; }
.hero-card li svg { flex: none; margin-top: 3px; color: var(--primary); }
.floating-chip {
  position: absolute; background: #fff; border: 1px solid var(--line);
  border-radius: 12px; padding: 10px 14px; font-size: .82rem; font-weight: 600; color: var(--ink);
  box-shadow: var(--shadow-md); display: flex; align-items: center; gap: 8px; animation: float 5s ease-in-out infinite;
}
.floating-chip small { display: block; font-weight: 400; color: var(--muted); font-size: .74rem; }
.chip-a { top: -16px; right: 26px; }
.chip-b { bottom: 24px; right: -18px; animation-delay: 2.4s; }
.chip-dot { width: 8px; height: 8px; border-radius: 50%; background: #16c784; box-shadow: 0 0 0 4px rgba(22,199,132,.18); }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

/* ---------- 服务卡片 ---------- */
.bg-soft { background: var(--bg-soft); }
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px; transition: all .25s ease; position: relative; overflow: hidden;
}
.card::after {
  content: ""; position: absolute; inset: auto 0 0; height: 3px; background: var(--grad);
  transform: scaleX(0); transform-origin: left; transition: transform .3s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(10,92,255,.25); }
.card:hover::after { transform: scaleX(1); }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: rgba(10, 92, 255, .08); color: var(--primary); margin-bottom: 18px;
}
.card-icon svg { width: 26px; height: 26px; }
.card h3 { margin-bottom: 10px; }
.card p { font-size: .92rem; color: var(--muted); margin-bottom: 14px; }
.card-link { font-size: .9rem; font-weight: 600; }
.card-link svg { width: 15px; height: 15px; vertical-align: -2px; margin-left: 2px; }

/* ---------- 流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
.step { position: relative; padding: 28px 24px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-size: 2.3rem; font-weight: 800; letter-spacing: -.04em; line-height: 1;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; opacity: .85;
}
.step h3 { margin: 14px 0 8px; font-size: 1.05rem; }
.step p { font-size: .9rem; color: var(--muted); margin: 0; }
.step-arrow {
  position: absolute; top: 50%; right: -19px; transform: translateY(-50%);
  width: 18px; height: 18px; color: var(--accent); z-index: 2; display: none;
}
@media (min-width: 900px) { .step-arrow { display: block; } }

/* ---------- 优势 ---------- */
.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.feature { display: flex; gap: 16px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.feature-icon { flex: none; width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; background: rgba(10,92,255,.08); color: var(--primary); }
.feature-icon svg { width: 23px; height: 23px; }
.feature h3 { font-size: 1.02rem; margin-bottom: 6px; }
.feature p { font-size: .92rem; color: var(--muted); margin: 0; }

/* ---------- CTA ---------- */
.cta {
  position: relative; overflow: hidden; border-radius: 24px;
  background: linear-gradient(120deg, #0a1e4d, #0b3bb0 55%, #0a5cff);
  padding: 64px 48px; text-align: center; color: #fff;
}
.cta::before {
  content: ""; position: absolute; inset: 0; opacity: .35;
  background-image: radial-gradient(closest-side at 20% 0%, rgba(56,182,255,.55), transparent),
    radial-gradient(closest-side at 90% 100%, rgba(56,182,255,.4), transparent);
  pointer-events: none;
}
.cta h2 { color: #fff; margin-bottom: 12px; }
.cta p { color: rgba(255,255,255,.82); max-width: 560px; margin: 0 auto 30px; position: relative; }
.cta .btn { position: relative; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--ink); color: rgba(255,255,255,.72); padding: 56px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 36px; padding-bottom: 44px; }
.footer-brand { color: #fff; font-weight: 700; font-size: 1.1rem; display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.site-footer h4 { color: #fff; font-size: .95rem; margin-bottom: 16px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; font-size: .92rem; }
.site-footer a { color: rgba(255,255,255,.72); }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 20px 0; font-size: .84rem; display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between; color: rgba(255,255,255,.55); }

/* ---------- 友情链接 & 备案 ---------- */
.friend-links {
  border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0;
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; font-size: .88rem;
}
.friend-title { color: #fff; font-weight: 600; }
.friend-links a { color: rgba(255,255,255,.6); }
.friend-links a:hover { color: #fff; }
.footer-icp { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.footer-icp a { color: rgba(255,255,255,.55); }
.footer-icp a:hover { color: #fff; }

/* ---------- 直接联系（联系页） ---------- */
.contact-cta { padding: 20px 0; border-bottom: 1px solid var(--line); }
.contact-cta:last-of-type { border-bottom: 0; }
.contact-cta-label { margin: 0 0 10px; font-size: .88rem; color: var(--muted); font-weight: 600; }
.contact-wechat { margin: 0 0 10px; font-size: 1.3rem; font-weight: 700; color: var(--ink); letter-spacing: .02em; }
.btn-lg { padding: 15px 32px; font-size: 1.2rem; letter-spacing: .03em; }

/* ---------- 页面横幅（内页） ---------- */
.page-hero {
  background:
    radial-gradient(900px 400px at 85% -10%, rgba(56,182,255,.20), transparent 60%),
    radial-gradient(700px 380px at 5% 20%, rgba(10,92,255,.10), transparent 55%),
    linear-gradient(180deg, #f6faff, #fff 70%);
  border-bottom: 1px solid var(--line); padding: 72px 0 60px; position: relative; overflow: hidden;
}
.page-hero h1 { margin-bottom: 12px; }
.page-hero p { color: var(--muted); max-width: 620px; font-size: 1.05rem; margin: 0; }
.crumbs { font-size: .86rem; color: var(--muted); margin-bottom: 20px; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--primary); }
.crumbs .sep { margin: 0 8px; opacity: .5; }

/* ---------- 服务详情块 ---------- */
.service-block { display: grid; grid-template-columns: .4fr 1fr; gap: 40px; align-items: start; }
.service-side { position: sticky; top: 92px; }
.service-side nav { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; overflow: hidden; }
.service-side a {
  display: flex; align-items: center; gap: 10px; padding: 13px 18px; font-weight: 500; font-size: .93rem;
  color: var(--ink-soft); border-bottom: 1px solid var(--line);
}
.service-side a:last-child { border-bottom: 0; }
.service-side a:hover { background: var(--bg-soft); color: var(--primary); }
.service-side a svg { width: 18px; height: 18px; color: var(--primary); flex: none; }
.service-side a.active { background: rgba(10,92,255,.07); color: var(--primary); }
.service-main h2 { display: flex; align-items: center; gap: 12px; font-size: 1.4rem; margin-bottom: 16px; }
.service-main h2 svg { width: 26px; height: 26px; color: var(--primary); flex: none; }
.service-main ul { padding-left: 20px; }
.service-main li { margin-bottom: 8px; }
.quote {
  background: var(--bg-soft); border-left: 4px solid var(--primary);
  border-radius: 0 12px 12px 0; padding: 18px 22px; margin: 22px 0; font-size: .96rem; color: var(--ink-soft);
}

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 44px; align-items: start; }
.contact-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px;
  box-shadow: var(--shadow-sm);
}
.contact-item { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.contact-item:last-child { border-bottom: 0; }
.contact-item .card-icon { margin: 0; width: 46px; height: 46px; }
.contact-item h3 { font-size: .98rem; margin-bottom: 2px; }
.contact-item p { margin: 0; color: var(--muted); font-size: .93rem; word-break: break-all; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { display: grid; gap: 6px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: .88rem; font-weight: 600; color: var(--ink-soft); }
.form-field input, .form-field textarea {
  font: inherit; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg-soft); color: var(--ink); transition: all .2s; width: 100%;
}
.form-field input:focus, .form-field textarea:focus {
  outline: none; border-color: var(--primary); background: #fff;
  box-shadow: 0 0 0 4px rgba(10,92,255,.10);
}
.form-note { font-size: .84rem; color: var(--muted); margin-top: 14px; }

/* ---------- 常见问题（FAQ） ---------- */
.faq-list { max-width: 820px; margin: 0 auto; display: grid; gap: 12px; }
.faq-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: box-shadow .25s ease, border-color .25s ease;
}
.faq-item[open] { box-shadow: var(--shadow-sm); border-color: rgba(10,92,255,.25); }
.faq-item summary {
  cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px; font-weight: 600; color: var(--ink); font-size: 1rem; gap: 14px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: ""; flex: none; width: 10px; height: 10px;
  border-right: 2px solid var(--primary); border-bottom: 2px solid var(--primary);
  transform: rotate(45deg); transition: transform .25s ease; margin-top: -4px;
}
.faq-item[open] summary::after { transform: rotate(225deg); margin-top: 4px; }
.faq-item p { padding: 0 22px 18px; margin: 0; color: var(--muted); font-size: .95rem; }

/* ---------- 关于页 ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
.about-visual { border-radius: 20px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow-md); }
.about-visual svg { width: 100%; height: auto; }
.value-list { display: grid; gap: 16px; list-style: none; margin: 22px 0 0; padding: 0; }
.value-list li { display: flex; gap: 12px; align-items: flex-start; }
.value-list svg { flex: none; width: 20px; height: 20px; color: var(--primary); margin-top: 3px; }
.value-list strong { color: var(--ink); }

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .floating-chip { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; padding: 64px 0 60px; }
  .cards, .steps { grid-template-columns: repeat(2, 1fr); }
  .service-block, .contact-grid, .about-grid { grid-template-columns: 1fr; }
  .service-side { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .chip-b { left: 8px; right: auto; }
}
@media (max-width: 720px) {
  section { padding: 64px 0; }
  .nav-toggle { display: block; }
  .menu {
    position: fixed; inset: 68px 0 auto; background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; padding: 16px 20px 24px; gap: 4px;
    transform: translateY(-120%); transition: transform .28s ease; box-shadow: var(--shadow-lg);
  }
  .menu.open { transform: none; }
  .menu a { padding: 12px 16px; border-radius: 10px; }
  .menu .nav-cta { margin: 10px 0 0; justify-content: center; }
  .cards, .steps { grid-template-columns: 1fr; }
  .features, .form-grid { grid-template-columns: 1fr; }
  .hero-stats li { padding-right: 20px; margin-right: 16px; }
  .cta { padding: 48px 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
  .chip-a { right: 10px; top: -12px; }
  .chip-b { left: 4px; bottom: 14px; right: auto; }
}
@media (max-width: 420px) {
  .hero-visual { display: none; }
}