/* ============================================================
   PCL2 官网 · 全站设计系统
   深蓝 Hero + 浅色主体 + 深色页脚 · Bento 网格 · 滚动动效
   ============================================================ */

:root {
  /* 色板 */
  --ink: #0b1c30;
  --ink-2: #45596f;
  --ink-3: #6b7f96;
  --brand: #1668c8;
  --brand-2: #3d9be9;
  --brand-deep: #0d4a9b;
  --bg: #f5f9fd;
  --card: #ffffff;
  --line: #e3ebf4;
  --navy: #081a30;
  --navy-2: #0d2b4e;

  --grad-brand: linear-gradient(120deg, #3d9be9 0%, #1668c8 100%);
  --grad-hero: linear-gradient(160deg, #0a1f3c 0%, #0d2b4e 55%, #0a3a6e 100%);

  --radius: 16px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(11, 44, 84, 0.06), 0 4px 14px rgba(11, 44, 84, 0.05);
  --shadow-md: 0 2px 6px rgba(11, 44, 84, 0.07), 0 16px 40px -12px rgba(13, 74, 155, 0.16);
  --shadow-lg: 0 4px 10px rgba(8, 26, 48, 0.10), 0 32px 80px -20px rgba(8, 42, 84, 0.35);
  --maxw: 1160px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: "MiSans", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand); text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.28; font-weight: 700; letter-spacing: -0.015em; }

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

/* ===== 滚动显现动效 ===== */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   顶部导航
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.3s, box-shadow 0.3s, backdrop-filter 0.3s;
  background: transparent;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(11, 44, 84, 0.08), 0 8px 28px -16px rgba(11, 44, 84, 0.18);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex; align-items: center; gap: 11px;
  font-size: 1.28rem; font-weight: 800; letter-spacing: 0.02em;
  color: #fff;
  transition: color 0.3s;
}
.site-header.scrolled .brand { color: var(--ink); }
.brand-ico {
  width: 30px; height: 30px;
  border-radius: 7px;
  filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.22));
}
.brand em { font-style: normal; color: inherit; transition: color 0.3s; }
.brand svg { filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.18)); }
.brand:hover { text-decoration: none; }

.main-nav { display: flex; gap: 4px; }
.main-nav a {
  position: relative;
  color: rgba(255, 255, 255, 0.78);
  padding: 9px 16px;
  border-radius: 10px;
  font-size: 0.96rem;
  font-weight: 500;
  transition: color 0.25s, background 0.25s;
}
.main-nav a:hover { color: #fff; background: rgba(255, 255, 255, 0.10); text-decoration: none; }
.main-nav a.active { color: #fff; font-weight: 600; }
.main-nav a.active::after {
  content: "";
  position: absolute; left: 16px; right: 16px; bottom: 4px;
  height: 2px; border-radius: 2px;
  background: var(--grad-brand);
}
.site-header.scrolled .main-nav a { color: var(--ink-2); }
.site-header.scrolled .main-nav a:hover { color: var(--brand); background: rgba(22, 104, 200, 0.07); }
.site-header.scrolled .main-nav a.active { color: var(--brand); }

.nav-cta {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 20px;
  border-radius: 999px;
  background: var(--grad-brand);
  color: #fff !important;
  font-weight: 600; font-size: 0.93rem;
  box-shadow: 0 6px 18px -4px rgba(22, 104, 200, 0.55);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 10px 26px -4px rgba(22, 104, 200, 0.65); text-decoration: none; }
.nav-cta-mobile { display: none; }

.menu-toggle {
  display: none;
  width: 42px; height: 42px;
  border: none; border-radius: 10px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff; font-size: 1.25rem; line-height: 1;
  cursor: pointer;
}
.site-header.scrolled .menu-toggle { background: rgba(22, 104, 200, 0.08); color: var(--ink); }

/* ============================================================
   Hero（深蓝渐变）
   ============================================================ */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--grad-hero);
  color: #fff;
  padding: 168px 0 0;
}
/* 网格纹理 + 光晕 */
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(120, 180, 240, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 180, 240, 0.055) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 90% 75% at 50% 20%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 75% at 50% 20%, #000 30%, transparent 78%);
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 42% 34% at 78% 26%, rgba(61, 155, 233, 0.28), transparent 70%),
    radial-gradient(ellipse 36% 30% at 12% 68%, rgba(22, 104, 200, 0.30), transparent 70%),
    radial-gradient(ellipse 50% 26% at 50% 108%, rgba(61, 155, 233, 0.20), transparent 72%);
  pointer-events: none;
}
.hero-inner {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.06fr);
  gap: 56px;
  align-items: center;
  padding-bottom: 76px;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid rgba(130, 190, 245, 0.35);
  background: rgba(61, 155, 233, 0.12);
  color: #a8d2f7;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  margin-bottom: 22px;
}
.hero-eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: #57c98a;
  box-shadow: 0 0 0 3px rgba(87, 201, 138, 0.22);
}
.hero h1.hero-brand {
  font-size: clamp(2.35rem, 4.2vw, 3.45rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.18;
  margin-bottom: 12px;
  color: #a8d2f7;
}
.hero .hero-title {
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: 18px;
}
.hero .hero-title .grad {
  background: linear-gradient(110deg, #7cc3f8 0%, #3d9be9 45%, #6db6f5 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
  color: rgba(214, 232, 250, 0.82);
  font-size: 1.09rem;
  max-width: 33em;
  margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 1.02rem; font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary {
  background: var(--grad-brand);
  color: #fff;
  box-shadow: 0 8px 26px -6px rgba(22, 104, 200, 0.65);
}
.btn-primary:hover { box-shadow: 0 14px 34px -6px rgba(22, 104, 200, 0.75); }
.btn-glass {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(150, 200, 245, 0.4);
  color: #eaf4fd;
  backdrop-filter: blur(6px);
}
.btn-glass:hover { background: rgba(255, 255, 255, 0.16); }
.btn-white {
  background: #fff; color: var(--brand);
  box-shadow: 0 10px 30px -8px rgba(7, 40, 80, 0.45);
}
.btn-ghost-light {
  background: #fff; border-color: #cddcf0; color: var(--brand);
}
.btn-ghost-light:hover { background: #eef5fd; }

/* Hero 右侧：截图舞台 */
.hero-stage { position: relative; }
.hero-shot {
  position: relative; z-index: 2;
  border-radius: 14px;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(140, 190, 240, 0.22),
    0 24px 60px -12px rgba(2, 14, 30, 0.65),
    0 60px 120px -30px rgba(2, 20, 44, 0.8);
}
.hero-glow {
  position: absolute; inset: -8% -6% -14%;
  background: radial-gradient(ellipse 60% 55% at 50% 55%, rgba(61, 155, 233, 0.35), transparent 72%);
  filter: blur(30px);
  z-index: 1;
}
/* 悬浮信息 chips */
.chip {
  position: absolute; z-index: 3;
  display: flex; align-items: center; gap: 10px;
  padding: 11px 18px;
  border-radius: 14px;
  background: rgba(13, 40, 74, 0.72);
  border: 1px solid rgba(140, 195, 245, 0.3);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 14px 34px -10px rgba(2, 14, 30, 0.6);
  font-size: 0.92rem; font-weight: 600; color: #e8f3fd;
  animation: float 5.5s ease-in-out infinite;
}
.chip .ico {
  width: 34px; height: 34px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.05rem;
  background: rgba(61, 155, 233, 0.22);
  flex-shrink: 0;
}
.chip small { display: block; font-weight: 400; font-size: 0.76rem; color: #9fc4e8; line-height: 1.4; }
.chip-1 { top: 6%; left: -7%; animation-delay: 0s; }
.chip-2 { bottom: 9%; right: -6%; animation-delay: 1.6s; }
.chip-3 { bottom: -4%; left: 10%; animation-delay: 3.1s; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-11px); }
}

/* Hero 底部数据条 */
.hero-stats {
  position: relative; z-index: 2;
  border-top: 1px solid rgba(140, 190, 245, 0.16);
  background: rgba(7, 22, 42, 0.35);
  backdrop-filter: blur(8px);
  padding: 26px 0;
}
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat { text-align: center; position: relative; }
.stat + .stat::before {
  content: "";
  position: absolute; left: 0; top: 12%; bottom: 12%;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(140, 190, 245, 0.35), transparent);
}
.stat strong {
  display: block;
  font-size: 1.9rem; font-weight: 800; letter-spacing: -0.02em;
  color: #fff;
  font-variant-numeric: tabular-nums;
}
.stat strong .unit { font-size: 1.05rem; font-weight: 700; color: #8ec3f2; margin-left: 2px; }
.stat > span { color: rgba(170, 205, 240, 0.8); font-size: 1.02rem; letter-spacing: 0.06em; }

/* ============================================================
   通用 Section
   ============================================================ */
.section { padding: 96px 0; }
.section + .section { padding-top: 8px; }
.section-head { max-width: 640px; margin-bottom: 52px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: 0.82rem; font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brand-2);
  margin-bottom: 12px;
}
.section-title { font-size: clamp(1.7rem, 2.6vw, 2.25rem); margin-bottom: 14px; }
.section-sub { color: var(--ink-2); font-size: 1.05rem; }

/* ===== 卡片 ===== */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(61, 155, 233, 0.45);
}

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* ============================================================
   界面一览（Bento 图库）
   ============================================================ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 22px;
}
.shot-card {
  grid-column: span 6;
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.shot-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.shot-card img {
  width: 100%; aspect-ratio: 16 / 10.2; object-fit: cover; object-position: top;
  border-radius: 11px 11px 0 0;
  transition: transform 0.5s var(--ease);
}
.shot-card:hover img { transform: scale(1.035); }
.shot-card figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  display: flex; align-items: baseline; gap: 12px;
  padding: 44px 22px 16px;
  background: linear-gradient(180deg, transparent, rgba(6, 24, 46, 0.82));
  color: #fff;
}
.shot-card figcaption strong { font-size: 1.04rem; }
.shot-card figcaption span { font-size: 0.86rem; color: rgba(219, 234, 249, 0.85); }

/* ============================================================
   功能 Bento
   ============================================================ */
.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 22px;
}
.bento-card {
  grid-column: span 2;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s;
  position: relative;
  overflow: hidden;
  display: flex; flex-direction: column;
}
.bento-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: rgba(61, 155, 233, 0.45); }
.bento-card.wide { grid-column: span 4; flex-direction: row; align-items: center; gap: 30px; }
.bento-card.wide .bento-text { flex: 1; }
.bento-card.wide .bento-visual {
  flex: 0 0 46%;
  border-radius: 12px; overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px -10px rgba(13, 74, 155, 0.25);
}
.bento-icon {
  width: 50px; height: 50px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.45rem;
  margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(61, 155, 233, 0.16), rgba(22, 104, 200, 0.10));
  border: 1px solid rgba(61, 155, 233, 0.28);
}
.bento-card h3 { font-size: 1.18rem; margin-bottom: 9px; }
.bento-card p { color: var(--ink-2); font-size: 0.96rem; }
.bento-card .bento-visual img { width: 100%; display: block; }

/* ===== 版本/加载器 pill 条 ===== */
.pill-strip {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 12px;
  margin-top: 46px;
}
.pill-strip .pill {
  padding: 9px 20px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  color: var(--ink-2);
  font-size: 0.92rem; font-weight: 600;
  transition: transform 0.2s, border-color 0.2s, color 0.2s;
}
.pill-strip .pill:hover { transform: translateY(-2px); border-color: rgba(61, 155, 233, 0.5); color: var(--brand); }

/* ============================================================
   用户评价（双行动态滚动）
   ============================================================ */
.review-marquee {
  display: flex;
  flex-direction: column;
  gap: 22px;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
}
.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 44s linear infinite;
}
.marquee-track.reverse { animation-direction: reverse; animation-duration: 52s; }
.marquee-track:hover { animation-play-state: paused; }
.marquee-group { display: flex; gap: 22px; padding-right: 22px; }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.review-card {
  flex: 0 0 400px;
  display: flex; flex-direction: column; gap: 14px;
  padding: 26px 26px 22px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.25s, box-shadow 0.25s;
}
.review-card:hover {
  border-color: rgba(61, 155, 233, 0.5);
  box-shadow: var(--shadow-md);
}
.review-card .stars { color: #f5b83d; font-size: 0.88rem; letter-spacing: 3px; }
.review-text { color: var(--ink-2); font-size: 0.97rem; flex: 1; }
.review-user { display: flex; align-items: center; gap: 12px; }
.review-user .who { display: flex; flex-direction: column; gap: 1px; }
.review-user .who strong { font-size: 0.95rem; line-height: 1.35; }
.review-user .who .stars { font-size: 0.82rem; letter-spacing: 2px; }
.avatar {
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(61, 155, 233, 0.14), rgba(22, 104, 200, 0.10));
  border: 1px solid rgba(61, 155, 233, 0.3);
  flex-shrink: 0;
}
.review-user strong { font-size: 0.95rem; }

/* ============================================================
   三步上手
   ============================================================ */
.steps-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.steps-grid::before {
  content: "";
  position: absolute; top: 34px; left: 12%; right: 12%;
  height: 2px;
  background: repeating-linear-gradient(90deg, rgba(61, 155, 233, 0.45) 0 10px, transparent 10px 20px);
}
.step-card {
  position: relative;
  text-align: center;
  padding: 34px 26px 30px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.step-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.step-num {
  position: relative; z-index: 1;
  width: 68px; height: 68px;
  margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--grad-brand);
  color: #fff;
  font-size: 1.35rem; font-weight: 800;
  box-shadow: 0 10px 24px -6px rgba(22, 104, 200, 0.55), 0 0 0 8px #f0f6fc;
}
.step-card h3 { font-size: 1.16rem; margin-bottom: 8px; }
.step-card p { color: var(--ink-2); font-size: 0.95rem; }
.cta-row { text-align: center; margin-top: 44px; }

/* ============================================================
   FAQ 手风琴
   ============================================================ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  margin-bottom: 13px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.25s, box-shadow 0.25s;
}
.faq-item[open] { border-color: rgba(61, 155, 233, 0.55); box-shadow: var(--shadow-md); }
.faq-item summary {
  cursor: pointer; list-style: none;
  padding: 18px 24px;
  font-weight: 600; font-size: 1.01rem;
  display: flex; justify-content: space-between; align-items: center; gap: 14px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item .arrow {
  width: 26px; height: 26px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  border-radius: 8px;
  color: var(--brand-2);
  background: rgba(61, 155, 233, 0.10);
  transition: transform 0.25s var(--ease);
}
.faq-item[open] .arrow { transform: rotate(180deg); }
.faq-item .answer { padding: 0 24px 20px; color: var(--ink-2); font-size: 0.96rem; }

/* ============================================================
   CTA 大区块
   ============================================================ */
.cta-box {
  position: relative;
  overflow: hidden;
  text-align: center;
  border-radius: var(--radius-lg);
  padding: 72px 30px;
  background: var(--grad-hero);
  color: #fff;
  box-shadow: var(--shadow-lg);
}
.cta-box::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(120, 180, 240, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 180, 240, 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 70% 90% at 50% 50%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 90% at 50% 50%, #000 20%, transparent 75%);
}
.cta-box::after {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 40% 60% at 22% 110%, rgba(61, 155, 233, 0.35), transparent 70%),
    radial-gradient(ellipse 40% 60% at 82% -10%, rgba(22, 104, 200, 0.4), transparent 70%);
}
.cta-box > * { position: relative; z-index: 1; }
.cta-box h2 { font-size: clamp(1.6rem, 2.6vw, 2.2rem); margin-bottom: 12px; }
.cta-box p { color: rgba(214, 232, 250, 0.85); margin-bottom: 30px; font-size: 1.05rem; }

/* 免责声明 */
.note-box {
  border: 1px solid var(--line);
  border-left: 4px solid var(--brand-2);
  border-radius: var(--radius-lg);
  background: var(--card);
  padding: 34px 36px;
  box-shadow: var(--shadow-sm);
}
.note-box h2 { font-size: 1.25rem; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.note-box ul { list-style: none; }
.note-box li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 12px;
  color: var(--ink-2);
  font-size: 0.95rem;
  line-height: 1.75;
}
.note-box li:last-child { margin-bottom: 0; }
.note-box li::before {
  content: "";
  position: absolute; left: 4px; top: 0.72em;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--brand-2);
}
.note-box li a { color: var(--brand-2); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }
.note-box li a:hover { color: var(--brand); }

/* ============================================================
   页脚（深蓝）
   ============================================================ */
.site-footer {
  margin-top: 96px;
  background: var(--navy);
  color: #b9cde3;
  padding: 64px 0 30px;
  position: relative;
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(120, 180, 240, 0.4), transparent);
}
.footer-grid {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 1.3rem; font-weight: 800; color: #fff; margin-bottom: 14px; }
.footer-ico { width: 32px; height: 32px; filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.35)); }
.footer-brand em { font-style: normal; color: inherit; }
.site-footer h4 { color: #fff; font-size: 0.98rem; margin-bottom: 16px; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 10px; }
.site-footer a { color: #b9cde3; transition: color 0.2s; }
.site-footer a:hover { color: #7cc3f8; text-decoration: none; }
.footer-desc { color: #8aa5c2; font-size: 0.92rem; max-width: 30em; }
.footer-bottom {
  position: relative; z-index: 1;
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid rgba(140, 180, 225, 0.14);
  font-size: 0.82rem; color: #7490ad;
}
.footer-bottom a { color: #7490ad; }

/* ============================================================
   子页面 Hero
   ============================================================ */
.page-hero {
  position: relative;
  overflow: hidden;
  background: var(--grad-hero);
  color: #fff;
  padding: 158px 0 72px;
  text-align: center;
}
.page-hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(120, 180, 240, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 180, 240, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 30%, #000 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 30%, #000 20%, transparent 80%);
}
.page-hero::after {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 36% 46% at 20% 20%, rgba(61, 155, 233, 0.25), transparent 70%),
    radial-gradient(ellipse 36% 46% at 82% 40%, rgba(22, 104, 200, 0.3), transparent 70%);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(2.1rem, 3.6vw, 2.9rem); margin: 16px 0 14px; }
.page-hero p { color: rgba(214, 232, 250, 0.82); max-width: 620px; margin: 0 auto; font-size: 1.06rem; }
.page-hero .eyebrow { color: #8ec3f2; }

/* ============================================================
   下载页
   ============================================================ */
.dl-local {
  max-width: 860px;
  margin: -58px auto 0;
  position: relative; z-index: 5;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.dl-local-head {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 20px 30px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #f8fbfe, #f2f7fc);
}
.dl-local-head h2 { font-size: 1.1rem; display: flex; align-items: center; gap: 10px; }
.dl-row {
  display: flex; align-items: center; gap: 18px;
  padding: 20px 30px;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s;
}
.dl-row:last-child { border-bottom: none; }
.dl-row:hover { background: #f8fbfe; }
.dl-ico {
  width: 46px; height: 46px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  border-radius: 13px;
  background: linear-gradient(135deg, rgba(61, 155, 233, 0.16), rgba(22, 104, 200, 0.1));
  border: 1px solid rgba(61, 155, 233, 0.28);
}
.dl-info { flex: 1; min-width: 0; }
.dl-info strong { display: block; font-size: 1rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dl-info span { font-size: 0.85rem; color: var(--ink-3); }
.dl-tag {
  flex-shrink: 0;
  font-size: 0.78rem; font-weight: 700;
  padding: 3px 12px; border-radius: 999px;
}
.dl-tag.rec { color: #0d7a44; background: rgba(24, 168, 96, 0.12); }
.dl-tag.dep { color: #a06a12; background: rgba(240, 172, 53, 0.16); }
.dl-tag.old { color: var(--ink-3); background: rgba(107, 127, 150, 0.12); }
.dl-btn {
  flex-shrink: 0;
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 20px;
  border-radius: 999px;
  background: var(--grad-brand);
  color: #fff; font-size: 0.9rem; font-weight: 600;
  box-shadow: 0 6px 16px -4px rgba(22, 104, 200, 0.5);
  transition: transform 0.2s, box-shadow 0.2s;
}
.dl-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 22px -4px rgba(22, 104, 200, 0.6); text-decoration: none; }

/* 版本选择卡 */
.dl-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.dl-card {
  position: relative;
  padding: 34px 30px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s;
  display: flex; flex-direction: column;
}
.dl-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.dl-card.hot { border-color: rgba(61, 155, 233, 0.6); box-shadow: 0 0 0 4px rgba(61, 155, 233, 0.10), var(--shadow-md); }
.dl-card .badge-corner {
  position: absolute; top: 22px; right: 22px;
  font-size: 0.78rem; font-weight: 700;
  color: var(--brand);
  background: rgba(61, 155, 233, 0.12);
  border: 1px solid rgba(61, 155, 233, 0.35);
  padding: 4px 13px; border-radius: 999px;
}
.dl-card h3 { font-size: 1.3rem; margin-bottom: 4px; }
.dl-card .ver { color: var(--brand-2); font-weight: 600; font-size: 0.94rem; margin-bottom: 14px; }
.dl-card .desc { color: var(--ink-2); font-size: 0.95rem; margin-bottom: 24px; flex: 1; }
.dl-card .spec {
  list-style: none;
  margin: 20px 0 24px; padding: 0;
}
.dl-card .spec li {
  display: flex; align-items: baseline; justify-content: space-between; gap: 14px;
  padding: 10px 2px;
  border-bottom: 1px solid var(--line);
}
.dl-card .spec li:first-child { border-top: 1px solid var(--line); }
.dl-card .spec li span { font-size: 0.85rem; color: var(--ink-3); flex-shrink: 0; }
.dl-card .spec li strong { font-size: 0.88rem; font-weight: 600; color: var(--ink); text-align: right; }
.dl-card .btn-row { display: flex; gap: 10px; }
.dl-card .btn-row .btn { flex: 1; display: inline-flex; align-items: center; justify-content: center; }
.dl-card .btn { width: 100%; }

/* 系统要求表 */
.req-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.req-table th, .req-table td {
  padding: 15px 20px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}
.req-table th { color: var(--brand); font-weight: 700; background: #f2f8fd; }
.req-table td { color: var(--ink-2); }
.req-table td:first-child { color: var(--ink); font-weight: 600; }
.req-table tr:last-child td { border-bottom: none; }

/* 更新时间线 */
.timeline { position: relative; max-width: 820px; margin: 0 auto; padding-left: 30px; }
.timeline::before {
  content: "";
  position: absolute; left: 7px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, rgba(61, 155, 233, 0.5), rgba(61, 155, 233, 0.08));
}
.release { position: relative; margin-bottom: 24px; padding: 26px 28px; }
.release::before {
  content: "";
  position: absolute; left: -30px; top: 34px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--grad-brand);
  box-shadow: 0 0 0 4px rgba(61, 155, 233, 0.18);
}
.release-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; flex-wrap: wrap; }
.release-head h3 { font-size: 1.22rem; }
.release-head time { color: var(--ink-3); font-size: 0.88rem; }
.release-badge {
  font-size: 0.78rem; font-weight: 700;
  color: var(--brand);
  background: rgba(61, 155, 233, 0.12);
  border: 1px solid rgba(61, 155, 233, 0.35);
  padding: 3px 12px; border-radius: 999px;
}
.release ul { list-style: none; }
.release li {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 7px 0;
  border-bottom: 1px dashed var(--line);
}
.release li:last-child { border-bottom: none; }
.item-text { color: var(--ink-2); font-size: 0.94rem; }
.tag {
  flex-shrink: 0;
  font-size: 0.76rem; font-weight: 700;
  padding: 2.5px 11px; border-radius: 999px; margin-top: 3px;
}
.t-feat { color: #0d7a44; background: rgba(24, 168, 96, 0.12); }
.t-opt  { color: var(--brand); background: rgba(22, 104, 200, 0.10); }
.t-fix  { color: #b26a10; background: rgba(255, 179, 92, 0.18); }
.t-chg  { color: var(--ink-2); background: rgba(107, 127, 150, 0.12); }

/* 目录树 */
.tree-pre {
  background: var(--navy);
  color: #a9d2f5;
  border-radius: var(--radius);
  padding: 24px 28px;
  overflow-x: auto;
  font-size: 0.94rem;
  line-height: 1.8;
  box-shadow: var(--shadow-md);
  max-width: 640px;
}
.tree-pre .hl { color: #7cc3f8; font-weight: 600; }

/* ============================================================
   教程页
   ============================================================ */
.tutorial-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
}
.tutorial-nav {
  position: sticky; top: 96px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 18px 12px;
}
.tutorial-nav a {
  display: flex; align-items: center; gap: 11px;
  padding: 9px 14px;
  border-radius: 10px;
  color: var(--ink-2);
  font-size: 0.92rem;
  transition: background 0.2s, color 0.2s;
}
.tutorial-nav a:hover { background: rgba(61, 155, 233, 0.08); color: var(--brand); text-decoration: none; }
.tutorial-nav a .n {
  width: 24px; height: 24px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  border-radius: 8px;
  background: #eaf3fb; color: var(--brand);
  font-size: 0.78rem; font-weight: 700;
}
.tutorial-nav a.current { background: rgba(61, 155, 233, 0.1); color: var(--brand); font-weight: 600; }

.step-block {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 22px;
  padding: 32px 30px;
  margin-bottom: 22px;
  scroll-margin-top: 96px;
}
.step-side { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.step-badge {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 18px;
  background: var(--grad-brand);
  color: #fff;
  font-size: 1.3rem; font-weight: 800;
  box-shadow: 0 10px 22px -6px rgba(22, 104, 200, 0.5);
}
.step-icon { font-size: 1.5rem; }
.step-block h2 { font-size: 1.3rem; margin-bottom: 12px; }
.step-block ul { list-style: none; margin-bottom: 16px; }
.step-block li {
  position: relative;
  padding: 5px 0 5px 24px;
  color: var(--ink-2); font-size: 0.96rem;
}
.step-block li::before {
  content: "";
  position: absolute; left: 4px; top: 15px;
  width: 7px; height: 7px;
  border-radius: 2px;
  background: var(--brand-2);
  transform: rotate(45deg);
}
.step-block code {
  background: #eef5fc; border: 1px solid var(--line);
  border-radius: 6px; padding: 1px 7px;
  font-size: 0.88em; color: var(--brand-deep);
}
.tip {
  display: flex; gap: 11px; align-items: flex-start;
  background: linear-gradient(120deg, rgba(61, 155, 233, 0.09), rgba(22, 104, 200, 0.05));
  border: 1px solid rgba(61, 155, 233, 0.3);
  border-radius: 12px;
  padding: 13px 17px;
  color: var(--brand-deep);
  font-size: 0.92rem;
}

/* ============================================================
   FAQ 页
   ============================================================ */
.faq-toolbar { max-width: 800px; margin: -30px auto 44px; position: relative; z-index: 5; }
.faq-search {
  display: flex; align-items: center; gap: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 15px 26px;
  box-shadow: var(--shadow-lg);
}
.faq-search input {
  flex: 1; border: none; outline: none;
  font-size: 1rem; font-family: inherit;
  color: var(--ink);
  background: transparent;
}
.faq-search input::placeholder { color: var(--ink-3); }
.faq-cat-strip { display: flex; flex-wrap: wrap; gap: 10px; }
.faq-group { margin-bottom: 40px; }
.faq-group-title {
  display: flex; align-items: center; gap: 12px;
  font-size: 1.15rem; margin-bottom: 18px;
}
.faq-group-title .ico {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 11px;
  background: rgba(61, 155, 233, 0.12);
  border: 1px solid rgba(61, 155, 233, 0.3);
}
.faq-empty {
  display: none;
  text-align: center; color: var(--ink-3);
  padding: 40px 0;
}

/* ============================================================
   关于/介绍页
   ============================================================ */
.about-intro {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
.about-copy p { color: var(--ink-2); margin-bottom: 16px; }
.about-copy strong { color: var(--ink); }
.about-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 28px;
}
.about-facts .fact {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 10px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.about-facts strong {
  display: block;
  font-size: 1.12rem;
  color: var(--brand);
  margin-bottom: 2px;
}
.about-facts span { font-size: 0.8rem; color: var(--ink-3); }
.about-visual img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  width: 100%;
}
.cmp-table td:first-child { min-width: 110px; }

@media (max-width: 1020px) {
  .about-intro { grid-template-columns: 1fr; gap: 40px; }
  .about-visual { max-width: 560px; }
}
@media (max-width: 620px) {
  .about-facts { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   首页：软件简介 / 适用人群
   ============================================================ */
.home-intro {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 52px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 48px 52px;
  box-shadow: var(--shadow-md, var(--shadow-sm));
}
.home-intro .intro-text { color: var(--ink-2); margin-bottom: 16px; line-height: 1.85; }
.home-intro .about-facts { margin-top: 0; }
.home-intro .about-facts .fact {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.home-intro .about-facts .fact strong {
  font-size: 1rem;
  white-space: nowrap;
}
.intro-side-btn { margin-top: 18px; text-align: center; }
.aud-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.aud-grid .bento-card { padding: 26px 24px; }
.aud-grid .bento-card p { font-size: 0.92rem; }

/* 首页简介/场景板块响应式（须位于基础规则之后才能生效） */
@media (max-width: 1020px) {
  .home-intro { grid-template-columns: 1fr; gap: 32px; }
  .aud-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .aud-grid { grid-template-columns: 1fr; }
  .home-intro { padding: 26px 18px; }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1020px) {
  .hero-inner { grid-template-columns: 1fr; gap: 46px; padding-bottom: 60px; }
  .hero { padding-top: 140px; }
  .hero-stage { max-width: 620px; margin: 0 auto; }
  .chip-1 { left: -2%; }
  .chip-2 { right: -2%; }
  .bento-card, .bento-card.wide { grid-column: span 6; flex-direction: column; align-items: stretch; }
  .bento-card.wide .bento-visual { flex: none; }
  .tutorial-layout { grid-template-columns: 1fr; }
  .tutorial-nav { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}
@media (max-width: 820px) {
  .home-intro { padding: 30px 24px; gap: 34px; }
  .menu-toggle { display: block; }
  .main-nav {
    display: none;
    position: fixed;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    padding: 14px 24px 20px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    box-shadow: 0 24px 40px -20px rgba(11, 44, 84, 0.3);
  }
  .main-nav.open { display: flex; }
  .site-header.scrolled .main-nav, .main-nav { border-bottom: 1px solid var(--line); }
  .main-nav a { color: var(--ink-2) !important; padding: 12px 14px; }
  .main-nav a.active { color: var(--brand) !important; }
  .main-nav a.active::after { display: none; }
  .nav-cta { display: none; }
  .main-nav .nav-cta-mobile {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    margin-top: 12px;
    color: #fff !important;
    padding: 11px 16px;
  }
  .home-intro .about-facts { grid-template-columns: repeat(2, 1fr); }
  .home-intro .about-facts .fact strong { white-space: normal; }
  .section { padding: 68px 0; }
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 26px 12px; }
  .stat + .stat::before { display: none; }
  .grid-2, .grid-3, .dl-cards, .steps-grid { grid-template-columns: 1fr; }
  .steps-grid::before { display: none; }
  .shot-card { grid-column: span 12; }
  .dl-row { flex-wrap: wrap; }
  .dl-btn { margin-left: 64px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero h1 br { display: none; }
  .chip { font-size: 0.8rem; padding: 9px 13px; }
  .chip .ico { width: 28px; height: 28px; font-size: 0.9rem; }
}
@media (max-width: 520px) {
  .container { padding: 0 20px; }
  .hero { padding-top: 120px; }
  .page-hero { padding: 130px 0 56px; }
  .chip-3 { display: none; }
.stat strong { font-size: 1.6rem; }
  .review-card { flex: 0 0 300px; }
  .stat > span { font-size: 0.95rem; }
  .step-block { grid-template-columns: 1fr; }
  .step-side { flex-direction: row; justify-content: flex-start; }
  .dl-btn { margin-left: 0; }
}