/* =========================================================================
   和悦网络科技 · 极简深色 · Minimal / Mysterious
   近黑底 · 大留白 · 柔光 · 噪点质感 · 单一克制强调 · mono 细节
   ========================================================================= */

:root {
  --bg: #08090c;
  --bg-2: #0b0d11;
  --panel: #0f1217;
  --panel-2: #12151b;

  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.14);

  --ink: #f4f6f9;
  --ink-2: #a6adb8;
  --muted: #6a7280;

  --accent: #5eead4;       /* 薄荷青 —— 极克制的点缀 */
  --accent-2: #2dd4bf;
  --glow: rgba(94, 234, 212, 0.10);

  --on-accent: #04201d;

  --nav-h: 64px;
  --maxw: 1080px;
  --radius: 14px;

  --mono: ui-monospace, "Cascadia Code", "SFMono-Regular", "JetBrains Mono", "Consolas", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
}

/* 产品强调色（仅作产品页 hero 的一束微光，整体仍近无彩色） */
.accent-teal  { --accent: #5eead4; --glow: rgba(94, 234, 212, 0.12); }
.accent-green { --accent: #6ee7a8; --glow: rgba(110, 231, 168, 0.12); }
.accent-blue  { --accent: #8ab4ff; --glow: rgba(138, 180, 255, 0.12); }
.accent-coral { --accent: #ff9aa8; --glow: rgba(255, 154, 168, 0.12); }
.accent-gold  { --accent: #f2cf7a; --glow: rgba(242, 207, 122, 0.12); }

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 40px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 320px;
  padding-top: var(--nav-h);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-2);
  background: var(--bg);
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* 柔光：深空感的顶部光晕 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(720px 460px at 50% -8%, var(--glow), transparent 70%),
    radial-gradient(560px 380px at 84% 4%, rgba(94, 234, 212, 0.05), transparent 72%),
    radial-gradient(900px 700px at 50% 120%, rgba(255, 255, 255, 0.02), transparent 70%);
}

/* 噪点质感：极淡颗粒，提升神秘氛围 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.03;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: var(--accent); color: var(--on-accent); }

a { color: inherit; text-decoration: none; transition: color .2s ease, opacity .2s ease; }
img, svg { max-width: 100%; display: block; }

p, span, strong, small, em, h1, h2, h3, h4, a, button, li { overflow-wrap: anywhere; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

h1, h2, h3 {
  margin: 0;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.025em;
}

:focus-visible { outline: 1px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

.skip-link {
  position: absolute;
  left: 16px; top: -64px;
  z-index: 1200;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

/* mono 眉题 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before {
  content: "";
  width: 14px; height: 1px;
  background: var(--accent);
  opacity: 0.8;
}

/* =========================================================================
   按钮
   ========================================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 540;
  line-height: 1;
  cursor: pointer;
  transition: transform .18s ease, background .2s ease, border-color .2s ease, color .2s ease, opacity .2s ease;
}
.btn .arrow { transition: transform .2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

.btn-primary { background: var(--ink); color: #07080b; }
.btn-primary:hover { transform: translateY(-1px); opacity: 0.9; }

.btn-ghost { border-color: var(--line-2); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink-2); background: rgba(255, 255, 255, 0.03); }

/* =========================================================================
   顶栏
   ========================================================================= */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease, backdrop-filter .3s ease;
}
.site-header.is-scrolled {
  background: rgba(8, 9, 12, 0.72);
  border-bottom-color: var(--line);
  backdrop-filter: saturate(150%) blur(12px);
  -webkit-backdrop-filter: saturate(150%) blur(12px);
}
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 30px; height: 30px;
  border-radius: 8px;
  border: 1px solid var(--line-2);
  background: var(--panel);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
}
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--ink-2);
  font-size: 0.9rem;
  transition: color .2s ease, background .2s ease;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--ink); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border: 1px solid var(--line-2);
  border-radius: 9px;
  color: var(--ink);
  font-size: 0.88rem;
  transition: border-color .2s ease, background .2s ease;
}
.nav-cta:hover { border-color: var(--ink-2); background: rgba(255, 255, 255, 0.03); }

.menu-toggle {
  display: none;
  width: 38px; height: 34px;
  border: 1px solid var(--line-2);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
}

/* =========================================================================
   通用区块
   ========================================================================= */
.section { padding: clamp(72px, 11vw, 150px) 0; }
.section-sm { padding: clamp(56px, 8vw, 110px) 0; }
.divider { border-top: 1px solid var(--line); }

.section-head { display: flex; flex-direction: column; gap: 16px; margin-bottom: clamp(40px, 6vw, 72px); }
.section-head h2 { font-size: clamp(1.6rem, 1.1rem + 2vw, 2.6rem); max-width: 18ch; }
.section-head p { color: var(--ink-2); max-width: 52ch; }

/* =========================================================================
   首页 Hero
   ========================================================================= */
.hero {
  min-height: calc(86vh - var(--nav-h));
  display: flex;
  align-items: center;
  padding: 60px 0;
}
.hero-inner { display: flex; flex-direction: column; align-items: flex-start; gap: 26px; }
.hero-title {
  font-size: clamp(2.6rem, 1.5rem + 5vw, 5.2rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.0;
  color: var(--ink);
  max-width: 16ch;
}
.hero-title .dim { color: var(--muted); }
.hero-sub {
  font-size: clamp(1rem, 0.95rem + 0.4vw, 1.2rem);
  color: var(--ink-2);
  max-width: 46ch;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 6px; }
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 30px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  width: 100%;
  max-width: 640px;
}
.hero-meta span {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.hero-meta span b { color: var(--ink-2); font-weight: 500; }

/* =========================================================================
   产品列表（首页 / 产品中心 / 下载 复用）
   ========================================================================= */
.product-list { border-top: 1px solid var(--line); }
.product-row {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: center;
  gap: 26px;
  padding: 30px 12px;
  border-bottom: 1px solid var(--line);
  color: inherit;
  transition: padding .25s ease, background .25s ease;
}
.product-row:hover { padding-left: 22px; padding-right: 2px; background: linear-gradient(90deg, rgba(255,255,255,0.025), transparent 60%); }
.product-row .idx { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); }
.product-row .pr-main { display: flex; flex-direction: column; gap: 5px; }
.product-row .pr-name {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.product-row .pr-name em {
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.product-row .pr-desc { color: var(--ink-2); font-size: 0.96rem; max-width: 58ch; }
.product-row .pr-side {
  display: flex;
  align-items: center;
  gap: 18px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  white-space: nowrap;
}
.product-row .pr-arrow {
  color: var(--ink-2);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity .25s ease, transform .25s ease, color .2s ease;
}
.product-row:hover .pr-name { color: #fff; }
.product-row:hover .pr-arrow { opacity: 1; transform: translateX(0); color: var(--accent); }

/* =========================================================================
   方法 / 理念（极简三点，无卡片）
   ========================================================================= */
.approach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.approach-cell {
  padding: 36px 30px;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background .25s ease;
}
.approach-cell:hover { background: var(--bg-2); }
.approach-cell .k { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); }
.approach-cell h3 { font-size: 1.2rem; color: var(--ink); }
.approach-cell p { font-size: 0.94rem; color: var(--ink-2); }

/* =========================================================================
   CTA 区
   ========================================================================= */
.cta { text-align: center; }
.cta-inner { display: flex; flex-direction: column; align-items: center; gap: 22px; }
.cta h2 { font-size: clamp(1.8rem, 1.2rem + 2.6vw, 3rem); max-width: 20ch; }
.cta p { color: var(--ink-2); max-width: 44ch; }
.cta .hero-actions { justify-content: center; }

/* =========================================================================
   产品详情（极简统一模板）
   ========================================================================= */
.detail-hero { padding: clamp(64px, 9vw, 120px) 0 clamp(40px, 5vw, 64px); }
.detail-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 40px;
}
.detail-back:hover { color: var(--ink-2); }
.detail-hero h1 {
  font-size: clamp(2.4rem, 1.6rem + 3.4vw, 4.2rem);
  letter-spacing: -0.035em;
  color: var(--ink);
  margin: 18px 0 0;
  max-width: 14ch;
}
.detail-tagline { font-size: clamp(1rem, 0.95rem + 0.4vw, 1.2rem); color: var(--ink-2); max-width: 48ch; margin-top: 20px; }
.detail-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}
.detail-meta div { display: flex; flex-direction: column; gap: 4px; }
.detail-meta .mk { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.detail-meta .mv { font-family: var(--mono); font-size: 0.9rem; color: var(--ink); }

.detail-body { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(36px, 6vw, 80px); align-items: start; }
.detail-body .lead { font-size: 1.1rem; color: var(--ink); line-height: 1.6; }
.detail-highlights { display: flex; flex-direction: column; }
.detail-highlights li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
}
.detail-highlights li:first-child { border-top: 1px solid var(--line); }
.detail-highlights .hi-idx { font-family: var(--mono); font-size: 0.74rem; color: var(--accent); }

.feature-rows { display: flex; flex-direction: column; }
.feature-rows .f-row {
  display: grid;
  grid-template-columns: 0.5fr 1fr;
  gap: 28px;
  padding: 34px 0;
  border-top: 1px solid var(--line);
}
.feature-rows .f-row h3 { font-size: 1.3rem; color: var(--ink); }
.feature-rows .f-row p { color: var(--ink-2); max-width: 52ch; }

/* =========================================================================
   关于
   ========================================================================= */
.about-statement {
  font-size: clamp(1.5rem, 1rem + 2.2vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.25;
  color: var(--ink);
  max-width: 22ch;
}
.about-statement .dim { color: var(--muted); }
.about-cols { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 64px); }
.about-cols p { color: var(--ink-2); }
.about-contact { display: flex; flex-direction: column; gap: 14px; margin-top: 8px; }
.about-contact a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.92rem;
  color: var(--ink);
  width: fit-content;
}
.about-contact a:hover { color: var(--accent); }

/* =========================================================================
   页脚
   ========================================================================= */
.site-footer {
  border-top: 1px solid var(--line);
  padding: clamp(48px, 6vw, 72px) 0 36px;
}
.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 40px;
}
.footer-top .brand { margin-right: 0; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 28px; }
.footer-nav a { color: var(--ink-2); font-size: 0.9rem; }
.footer-nav a:hover { color: var(--ink); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.footer-bottom, .footer-records a { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); letter-spacing: 0.03em; }
.footer-records { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-records a:hover { color: var(--ink-2); }

/* =========================================================================
   响应式
   ========================================================================= */
@media (max-width: 860px) {
  .menu-toggle { display: inline-grid; place-items: center; }
  .nav-links, .nav .nav-cta { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    position: absolute;
    top: var(--nav-h); left: 0; right: 0;
    padding: 14px 28px 20px;
    background: rgba(8, 9, 12, 0.96);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(12px);
  }
  .nav-links.open a { padding: 12px; }

  .detail-body { grid-template-columns: 1fr; }
  .feature-rows .f-row { grid-template-columns: 1fr; gap: 10px; }
  .approach-grid { grid-template-columns: 1fr; }
  .about-cols { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .container, .nav { padding: 0 20px; }
  .product-row { grid-template-columns: 30px 1fr; gap: 8px 14px; padding: 22px 4px; }
  .product-row:hover { padding-left: 4px; }
  .product-row .pr-side { grid-column: 2; justify-content: flex-start; gap: 14px; }
  .product-row .pr-arrow { display: none; }
  .detail-meta { gap: 14px 24px; }
  .footer-top { flex-direction: column; gap: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}