/* ============================================================
   星智工具箱官网 · 样式
   品牌色：主红 #ff4d00 / 品牌红 #ef4f48 / 科技蓝 #1554e8
   ============================================================ */

:root {
  --primary: #ff4d00;
  --primary-deep: #f04400;
  --primary-soft: #fff1ea;
  --brand-red: #ef4f48;
  --tech-blue: #1554e8;
  --ink: #1f2937;
  --ink-2: #344054;
  --muted: #667085;
  --line: #e7ecf3;
  --bg-soft: #f7f9fc;
  --radius: 16px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 12px 32px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 24px 64px rgba(15, 23, 42, 0.16);
  --font: "PingFang SC", "Microsoft YaHei", "微软雅黑", "Segoe UI",
    system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  font-family: var(--font);
  color: var(--ink-2);
  background: #fff;
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.container {
  width: min(1180px, 92%);
  margin: 0 auto;
}
.container-narrow { width: min(860px, 92%); }

.icon {
  width: 1.15em;
  height: 1.15em;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
  vertical-align: -0.2em;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(135deg, #ff6a2b, var(--primary) 55%, var(--primary-deep));
  color: #fff;
  box-shadow: 0 10px 24px rgba(255, 77, 0, 0.32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(255, 77, 0, 0.4); }

.btn-ghost {
  background: #fff;
  color: var(--ink);
  border: 1.5px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.btn-ghost:hover { border-color: #ffc6ad; color: var(--primary); transform: translateY(-2px); }

.btn-light {
  background: #fff;
  color: var(--primary-deep);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.22);
}
.btn-light:hover { transform: translateY(-2px); }

.btn-sm { padding: 9px 20px; font-size: 14.5px; }
.btn-lg { padding: 14px 30px; font-size: 16.5px; }
.btn-pulse { animation: pulse 2.6s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% { box-shadow: 0 10px 24px rgba(255, 77, 0, 0.32); }
  50% { box-shadow: 0 10px 34px rgba(255, 77, 0, 0.5); }
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: box-shadow 0.25s ease, background 0.25s ease;
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08); background: rgba(255, 255, 255, 0.96); }

.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 68px;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 40px; height: 40px; border-radius: 10px; box-shadow: var(--shadow-sm); }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 17px; color: var(--ink); letter-spacing: 0.5px; }
.brand-text small { font-size: 10px; color: var(--muted); letter-spacing: 1.6px; }

.main-nav { display: flex; gap: 28px; margin-left: auto; }
.main-nav a {
  font-size: 15px;
  color: var(--ink-2);
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%; bottom: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: right 0.22s ease;
}
.main-nav a:hover { color: var(--primary); }
.main-nav a:hover::after { right: 0; }

.header-actions { display: flex; align-items: center; gap: 14px; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 22px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 150px 0 90px;
  overflow: hidden;
  background: linear-gradient(180deg, #fff 0%, #fff7f3 58%, #fff 100%);
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
}
.glow-red { width: 480px; height: 480px; background: #ffd9c4; top: -140px; right: -80px; animation: drift 14s ease-in-out infinite; }
.glow-blue { width: 420px; height: 420px; background: #d3e2ff; bottom: -160px; left: -120px; animation: drift 18s ease-in-out infinite reverse; }
.hero-grid {
  position: absolute;
  inset: 0;
  background: none;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 75%);
}

.hero-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.hero-inner > * { min-width: 0; width: 100%; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid #ffd9c4;
  color: var(--primary-deep);
  font-size: 13.5px;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}
.hero-badge .icon { color: var(--primary); }

.hero h1 {
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1.2;
  color: var(--ink);
  letter-spacing: 1px;
  margin: 24px 0 20px;
  font-weight: 800;
}
.hero h1 em {
  font-style: normal;
  color: #ff6a2b;
}

.hero-sub {
  font-size: 17.5px;
  color: var(--muted);
  max-width: 40em;
  margin: 0 auto;
}

.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; justify-content: center; }

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, auto);
  justify-content: center;
  gap: 12px 56px;
  margin-top: 48px;
}
.hero-metrics li { display: flex; flex-direction: column; }
.hero-metrics strong {
  font-size: 26px;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0.5px;
}
.hero-metrics span { font-size: 13px; color: var(--muted); }

/* Hero 视觉：客户端窗口模拟（宽幅居中） */
.hero-visual { position: relative; max-width: 940px; margin: 56px auto 0; }
.app-window {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid #eef1f6;
  overflow: hidden;
}
.app-titlebar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  border-bottom: 1px solid #f0f2f7;
  background: #fbfcfe;
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }
.app-title { margin-left: 10px; font-size: 13px; color: var(--ink-2); font-weight: 600; }
.app-ver {
  margin-left: auto;
  font-size: 11px;
  color: var(--muted);
  background: #f1f4f9;
  border-radius: 999px;
  padding: 2px 10px;
}

.app-body { display: grid; grid-template-columns: 132px 1fr; }
.app-body > * { min-width: 0; }
.app-side { max-width: 132px; }
.app-side {
  border-right: 1px solid #f0f2f7;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: #fbfcfe;
}
.side-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--ink-2);
  padding: 7px 10px;
  border-radius: 8px;
}
.side-item.active { background: var(--primary-soft); color: var(--primary-deep); font-weight: 600; }
.side-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c); flex: none; }

.app-main { padding: 14px 16px 16px; }
.app-tabs { display: flex; gap: 6px; margin-bottom: 12px; }
.app-tab {
  font-size: 11.5px;
  padding: 4px 12px;
  border-radius: 999px;
  color: var(--muted);
  background: #f4f6fa;
}
.app-tab.active { background: var(--primary); color: #fff; font-weight: 600; }

.app-tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 12px; }
.app-tile {
  border: 1px solid #eef1f6;
  border-radius: 10px;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.app-tile small { font-size: 10.5px; color: var(--muted); }
.app-tile strong { font-size: 14.5px; color: var(--ink); font-weight: 700; white-space: nowrap; }
.app-tile em { font-size: 10px; font-style: normal; font-weight: 700; }
.app-tile .up { color: #e0342b; }
.app-tile .down { color: #0f9d58; }

.app-bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 74px;
  padding: 0 2px;
  margin-bottom: 12px;
}
.app-bars i {
  flex: 1;
  height: var(--h);
  border-radius: 4px 4px 2px 2px;
  background: linear-gradient(180deg, #ffb28a, #ff5f1f);
  opacity: 0.85;
}
.app-bars i:nth-child(3n) { background: linear-gradient(180deg, #9fc0ff, #3f6fe8); opacity: 0.8; }

.app-tasks { display: flex; flex-direction: column; gap: 6px; }
.app-task {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--ink-2);
  background: #fafbfd;
  border: 1px solid #f0f2f7;
  border-radius: 8px;
  padding: 7px 10px;
}
.app-task .icon { width: 14px; height: 14px; }
.app-task .ok { color: #16a34a; }
.app-task .run { color: var(--primary); }
.app-task .wait { color: #94a3b8; }

.float-chip {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  border: 1px solid #f0f2f7;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink);
  padding: 10px 14px;
  animation: floaty 5s ease-in-out infinite;
  z-index: 3;
}
.float-chip .icon { color: var(--primary); }
.chip-1 { top: -30px; right: 7%; }
.chip-2 { bottom: -18px; left: 3%; animation-delay: 2.4s; }
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ---------- 毛玻璃通用 ---------- */
.glass {
  background: rgba(255, 255, 255, 0.66);
  backdrop-filter: blur(18px) saturate(1.5);
  -webkit-backdrop-filter: blur(18px) saturate(1.5);
  border: 1px solid rgba(255, 255, 255, 0.7);
}

/* 区块背景光斑（配合毛玻璃） */
.section-features, .section-changelog, .section-services, .section-value {
  position: relative;
  overflow: hidden;
}
.section-features::before, .section-changelog::before, .section-services::before,
.section-value::before,
.section-features::after, .section-changelog::after, .section-services::after,
.section-value::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  pointer-events: none;
  z-index: 0;
}
.section-features::before, .section-value::before {
  width: 560px; height: 560px;
  background: #ffe3d2;
  top: -180px; left: -220px;
  opacity: 0.26;
  filter: blur(110px);
  animation: drift 16s ease-in-out infinite;
}
.section-features::after, .section-value::after {
  width: 520px; height: 520px;
  background: #dce8ff;
  bottom: -160px; right: -160px;
  opacity: 0.4;
  animation: drift 20s ease-in-out infinite reverse;
}
.section-services::before {
  width: 460px; height: 460px;
  background: #ffe4d0;
  top: -100px; right: -140px;
  opacity: 0.38;
  animation: drift 18s ease-in-out infinite;
}
.section-services::after {
  width: 420px; height: 420px;
  background: #d6e4ff;
  bottom: -140px; left: -120px;
  opacity: 0.4;
  animation: drift 22s ease-in-out infinite reverse;
}
@keyframes drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 40px) scale(1.12); }
}
.section-features > .container,
.section-changelog > .container,
.section-services > .container,
.section-value > .container { position: relative; z-index: 1; }

/* ---------- 通用区块 ---------- */
.section { padding: 88px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--primary);
  background: var(--primary-soft);
  border-radius: 999px;
  padding: 5px 16px;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: clamp(26px, 3.4vw, 38px);
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 1px;
  line-height: 1.35;
}
.section-head p { color: var(--muted); margin-top: 12px; font-size: 16px; }
.section-head-light h2, .section-head-light p { color: #fff; }
.section-head-light .section-eyebrow { background: rgba(255, 255, 255, 0.16); color: #ffd9c4; }

/* ---------- 核心价值 ---------- */
.section-value {
  background:
    radial-gradient(ellipse 60% 90% at 100% 10%, #fff3ec 0%, transparent 55%),
    linear-gradient(180deg, #fff 0%, #fff 55%, #f7f9fc 100%);
}
.value-inner { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; align-items: center; }
.value-inner > * { min-width: 0; }
.value-head h2 {
  font-size: clamp(26px, 3.2vw, 36px);
  color: var(--ink);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: 1px;
}
.value-head p { margin-top: 16px; color: var(--muted); font-size: 16px; max-width: 26em; }
.value-head .section-eyebrow { margin-bottom: 18px; }

.value-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.value-card {
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(16px) saturate(1.5);
  -webkit-backdrop-filter: blur(16px) saturate(1.5);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: var(--radius);
  padding: 28px 22px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.value-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.value-card h3 { font-size: 18px; color: var(--ink); margin: 14px 0 8px; }
.value-card p { font-size: 14px; color: var(--muted); }
.value-icon {
  display: inline-flex;
  width: 46px; height: 46px;
  border-radius: 13px;
  align-items: center;
  justify-content: center;
}
.value-icon .icon { width: 22px; height: 22px; }
.vi-red { background: var(--primary-soft); color: var(--primary); }
.vi-blue { background: #fff0e6; color: #ff8a3d; }
.vi-amber { background: #fff7e6; color: #d97706; }

/* ---------- 功能速查 ---------- */
.section-features { background: var(--bg-soft); }

.finder {
  max-width: 980px;
  margin: 0 auto;
}
.finder-search {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px) saturate(1.5);
  -webkit-backdrop-filter: blur(16px) saturate(1.5);
  border: 1px solid rgba(255, 255, 255, 0.85);
  border-radius: 999px;
  padding: 14px 24px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  max-width: 560px;
  margin: 0 auto 22px;
}
.finder-search:focus-within {
  border-color: #3b6fe0;
  box-shadow: 0 0 0 4px rgba(59, 111, 224, 0.14);
}
.finder-search .icon { color: var(--muted); width: 20px; height: 20px; }
.finder-search input {
  border: none;
  outline: none;
  background: none;
  width: 100%;
  font-size: 15.5px;
  font-family: inherit;
  color: var(--ink);
}
.finder-search input::placeholder { color: #9aa3b2; }

.feature-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  padding: 4px 0 26px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(14px) saturate(1.5);
  -webkit-backdrop-filter: blur(14px) saturate(1.5);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13.5px;
  font-weight: 600;
  font-family: inherit;
  color: var(--ink-2);
  box-shadow: var(--shadow-sm);
  transition: all 0.18s ease;
  cursor: pointer;
}
.chip em {
  font-style: normal;
  font-size: 11.5px;
  line-height: 1;
  color: var(--muted);
  background: rgba(15, 23, 42, 0.06);
  border-radius: 999px;
  padding: 3px 7px;
  display: inline-flex;
  align-items: center;
}
.chip.active em { background: rgba(255, 255, 255, 0.25); color: #fff; }
.chip:hover { border-color: #ffb28a; color: var(--primary); transform: translateY(-2px); }
.chip.active { background: var(--primary); border-color: var(--primary); color: #fff; box-shadow: 0 8px 18px rgba(255, 77, 0, 0.3); }
.chip .icon { width: 15px; height: 15px; }

.finder-panel { min-height: 320px; }
.finder-panel.swap .fg-grid { animation: cardsIn 0.45s ease both; }
@keyframes cardsIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.finder-hint {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 18px;
}
.finder-hint b { color: var(--primary); font-size: 16px; }
.finder-empty {
  text-align: center;
  padding: 70px 20px;
  background: #fff;
  border: 1.5px dashed var(--line);
  border-radius: var(--radius);
}
.finder-empty .icon { width: 40px; height: 40px; color: #c3cbd8; }
.finder-empty h4 { color: var(--ink); font-size: 17px; margin: 14px 0 8px; }
.finder-empty p { color: var(--muted); font-size: 14px; }
.finder-empty em { font-style: normal; color: var(--primary); font-weight: 600; }

.feature-groups { display: flex; flex-direction: column; gap: 56px; }

.fg-head { display: flex; align-items: center; gap: 16px; margin-bottom: 22px; }
.fg-head.mini { margin: 30px 0 16px; }
.fg-head.mini .fg-icon { width: 42px; height: 42px; border-radius: 12px; }
.fg-head.mini .fg-icon .icon { width: 20px; height: 20px; }
.fg-head.mini h3 { font-size: 17px; }
.fg-head.mini p { font-size: 12.5px; }
.fg-head h3 { font-size: 22px; color: var(--ink); font-weight: 800; letter-spacing: 1px; }
.fg-head p { font-size: 14px; color: var(--muted); }
.fg-icon {
  display: inline-flex;
  width: 52px; height: 52px;
  border-radius: 15px;
  align-items: center;
  justify-content: center;
  background: #fff3ec;
  color: var(--primary-deep);
  box-shadow: inset 0 0 0 1px rgba(255, 77, 0, 0.1);
  flex: none;
}
.fg-icon .icon { width: 25px; height: 25px; }

.fg-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.feature-card {
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(16px) saturate(1.5);
  -webkit-backdrop-filter: blur(16px) saturate(1.5);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 14px;
  padding: 18px 20px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: #ffd9c4; background: rgba(255, 255, 255, 0.85); }
.feature-card h4 {
  font-size: 15.5px;
  color: var(--ink);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.f-icon {
  width: 30px;
  height: 30px;
  flex: none;
  transition: transform 0.25s ease;
}
.feature-card:hover .f-icon { transform: scale(1.15) rotate(-4deg); }
.f-icon-fallback {
  width: 30px;
  height: 30px;
  flex: none;
  color: var(--primary);
  background: var(--primary-soft);
  border-radius: 8px;
  padding: 5px;
  box-sizing: border-box;
}
.feature-card p { font-size: 13px; color: var(--muted); line-height: 1.65; }
.tag {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--tech-blue);
  background: #eef4ff;
  border-radius: 999px;
  padding: 1px 9px;
  letter-spacing: 1px;
  flex: none;
}
.feature-card.is-planned { background: #fbfcfe; }
.feature-card.is-planned h4 { color: #475467; }

/* ---------- 企业服务 ---------- */
.service-cards { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.service-card {
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(16px) saturate(1.5);
  -webkit-backdrop-filter: blur(16px) saturate(1.5);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}
.service-card h3 { font-size: 15.5px; color: var(--ink); margin-bottom: 6px; }
.service-card p { font-size: 12.5px; color: var(--muted); }

/* ---------- 免费试用横幅（浅色玻璃风） ---------- */
.section-register { padding: 72px 0; }
.trial-band {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 36px;
  background:
    radial-gradient(ellipse 70% 120% at 100% 0%, rgba(255, 138, 61, 0.2) 0%, transparent 60%),
    linear-gradient(135deg, #ffffff 52%, #ffeee2 100%);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border: 1.5px solid rgba(255, 77, 0, 0.22);
  border-radius: 28px;
  padding: 50px 56px;
  color: var(--ink);
  box-shadow: 0 20px 60px rgba(255, 77, 0, 0.12);
  position: relative;
  overflow: hidden;
}
.trial-copy { position: relative; text-align: left; }
.trial-copy .section-eyebrow { background: var(--primary-soft); color: var(--primary-deep); }
.trial-copy h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 800; letter-spacing: 1px; margin-top: 8px; line-height: 1.35; color: var(--ink); }
.trial-copy p { margin-top: 12px; color: var(--muted); font-size: 15px; max-width: 30em; }
.trial-copy p b { color: var(--primary-deep); }
.trial-qr {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.qr-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px;
  text-align: center;
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.qr-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.qr-item img { width: 100%; border-radius: 10px; }
.qr-item strong { display: block; font-size: 14px; margin-top: 10px; color: var(--ink); }
.qr-item span { display: block; font-size: 11.5px; color: var(--muted); margin-top: 3px; }

/* ---------- 更新日志 ---------- */
.section-changelog { background: var(--bg-soft); }
.timeline { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 18px; }
.tl-item {
  background: rgba(255, 255, 255, 0.66);
  backdrop-filter: blur(16px) saturate(1.5);
  -webkit-backdrop-filter: blur(16px) saturate(1.5);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.tl-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.tl-head { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-bottom: 14px; }
.tl-ver {
  font-weight: 800;
  color: var(--primary-deep);
  background: var(--primary-soft);
  border-radius: 8px;
  padding: 3px 12px;
  font-size: 14.5px;
}
.tl-date { font-size: 13px; color: var(--muted); }
.tl-theme { font-size: 14px; font-weight: 600; color: var(--ink); }
.tl-item ul { display: flex; flex-direction: column; gap: 8px; }
.tl-item li { font-size: 14px; color: var(--ink-2); display: flex; gap: 10px; align-items: baseline; }
.tl-item li i {
  font-style: normal;
  font-size: 11.5px;
  font-weight: 600;
  border-radius: 6px;
  padding: 1px 8px;
  flex: none;
  letter-spacing: 1px;
}
.tl-item li i { letter-spacing: 1px; }
.tl-item li i.tl-new { background: #e8f7ee; color: #16a34a; }
.tl-item li i.tl-opt { background: #fff1ea; color: #f04400; }
.tl-item li i.tl-fix { background: #f2f4f8; color: #667085; }
.tl-item li i.tl-upd { background: #f3efff; color: #7c3aed; }
.tl-item li.tl-more { color: var(--muted); font-size: 13px; }
.changelog-more { text-align: center; margin-top: 32px; }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px) saturate(1.5);
  -webkit-backdrop-filter: blur(16px) saturate(1.5);
  border: 1px solid rgba(15, 23, 42, 0.06);
  border-radius: 14px;
  padding: 4px 24px;
  box-shadow: 0 1px 2px rgba(20, 10, 0, 0.04), 0 10px 28px rgba(20, 10, 0, 0.06);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.faq-item[open] { border-color: #ffc6ad; }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  padding: 16px 0;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .icon { color: var(--muted); transition: transform 0.25s ease; flex: none; }
.faq-item[open] summary .icon { transform: rotate(180deg); color: var(--primary); }
.faq-body { padding: 0 0 18px; color: var(--muted); font-size: 14.5px; }
.faq-link { color: var(--primary); font-weight: 600; text-decoration: underline; }

/* ---------- 资源中心页 ---------- */
.page-hero {
  position: relative;
  padding: 150px 0 64px;
  overflow: hidden;
  background: linear-gradient(180deg, #fff 0%, #fff7f3 100%);
}
.page-hero-bg { position: absolute; inset: 0; pointer-events: none; }
.page-hero-inner { position: relative; }
.crumbs { display: flex; gap: 10px; font-size: 13.5px; color: var(--muted); margin-bottom: 18px; }
.crumbs a:hover { color: var(--primary); }
.crumbs b { color: var(--primary-deep); font-weight: 600; }
.page-hero h1 { font-size: clamp(30px, 4vw, 44px); color: var(--ink); font-weight: 800; letter-spacing: 1px; }
.page-hero p { margin-top: 12px; color: var(--muted); font-size: 16px; max-width: 40em; }

.section-resources { padding-top: 64px; }
.res-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.res-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.res-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: #ffc6ad; }
.res-cover { aspect-ratio: 16 / 8.2; overflow: hidden; background: #f4f6fa; }
.res-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.res-card:hover .res-cover img { transform: scale(1.05); }
.res-body { display: flex; flex-direction: column; gap: 10px; padding: 22px 24px 24px; flex: 1; }
.res-meta { display: flex; align-items: center; justify-content: space-between; }
.res-tag { font-size: 12px; font-weight: 700; letter-spacing: 1px; border-radius: 999px; padding: 3px 12px; }
.res-meta time { font-size: 12.5px; color: var(--muted); }
.res-body h3 { font-size: 17px; color: var(--ink); line-height: 1.5; }
.res-card:hover .res-body h3 { color: var(--primary-deep); }
.res-body p { font-size: 13.5px; color: var(--muted); flex: 1; }
.res-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--primary);
}
.res-more .icon { transition: transform 0.2s ease; }
.res-card:hover .res-more .icon { transform: translateX(4px); }
.res-empty-hint {
  margin-top: 40px;
  text-align: center;
  font-size: 14px;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.res-empty-hint .icon { color: var(--primary); }
.nav-current { color: var(--primary); font-weight: 700; }

/* ---------- 页脚 ---------- */
.site-footer { background: #14161a; color: #9aa3b2; padding: 56px 0 32px; }
.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand { display: flex; gap: 14px; align-items: center; }
.footer-mark { width: 46px; height: 46px; border-radius: 12px; }
.footer-brand strong { color: #fff; font-size: 17px; display: block; margin-bottom: 2px; }
.footer-brand p { font-size: 13.5px; }
.footer-qr {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 4px;
}
.footer-qr img {
  width: 76px;
  height: 76px;
  border-radius: 10px;
  background: #fff;
  padding: 4px;
}
.footer-qr span { font-size: 12px; color: #9aa3b2; line-height: 1.6; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 10px 26px; padding-top: 12px; }
.footer-nav a { font-size: 14px; transition: color 0.18s ease; }
.footer-nav a:hover { color: #fff; }
.footer-bottom { display: flex; flex-direction: column; gap: 4px; padding-top: 24px; font-size: 12.5px; }
.footer-note { color: rgba(255, 255, 255, 0.55); }
.changelog-more .btn-ghost {
  color: var(--primary-deep);
  border: 1.5px solid rgba(255, 77, 0, 0.35);
  background: rgba(255, 77, 0, 0.07);
  text-decoration: none;
  padding: 12px 26px;
  font-weight: 600;
}
.changelog-more .btn-ghost:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ---------- 右侧悬浮：客服 / 公众号 ---------- */
.float-contact {
  position: fixed;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 95;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.fc-btn {
  width: 68px;
  height: 68px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.85);
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.94), rgba(255, 240, 232, 0.94));
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  color: var(--primary);
  box-shadow: 0 10px 26px rgba(255, 77, 0, 0.2), 0 2px 8px rgba(15, 23, 42, 0.08);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-family: inherit;
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.fc-btn .icon { width: 26px; height: 26px; }
.fc-btn em {
  font-style: normal;
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 1px;
}
.fc-btn:hover {
  transform: translateX(-5px) scale(1.04);
  box-shadow: 0 16px 34px rgba(255, 77, 0, 0.3), 0 4px 12px rgba(15, 23, 42, 0.1);
}
.fc-popup {
  position: absolute;
  right: 82px;
  width: 224px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  padding: 16px;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transform: translateX(10px);
  transition: all 0.24s ease;
  pointer-events: none;
}
.fc-popup[data-popup="mp"] { bottom: 0; }
.fc-popup[data-popup="kf"] { bottom: 82px; }
.fc-popup.open {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
  pointer-events: auto;
}
.fc-popup img {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--line);
}
.fc-popup strong { display: block; font-size: 14px; color: var(--ink); margin-top: 10px; }
.fc-popup span { display: block; font-size: 11.5px; color: var(--muted); margin-top: 4px; line-height: 1.6; }

/* ---------- 回到顶部 ---------- */
.back-to-top {
  position: fixed;
  right: 26px;
  bottom: 30px;
  z-index: 90;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: none;
  background: #fff;
  color: var(--primary);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.25s ease;
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--primary); color: #fff; }

/* ---------- 入场动画：内容默认可读，避免锚点跳转或低性能设备出现空白 ---------- */
html.js .reveal {
  opacity: 1;
  transform: translateY(14px);
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}
html.js .reveal.visible { transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  html.js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .float-chip { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; gap: 64px; }
  .hero { padding-top: 130px; }
  .hero-copy { text-align: center; }
  .hero-sub { margin: 0 auto; }
  .hero-ctas { justify-content: center; }
  .hero-metrics { justify-content: center; gap: 12px 32px; }
  .value-inner { grid-template-columns: 1fr; gap: 36px; }
  .fg-grid { grid-template-columns: repeat(2, 1fr); }
  .service-cards { grid-template-columns: repeat(3, 1fr); }
  .trial-band { grid-template-columns: 1fr; text-align: center; padding: 40px 32px; }
  .trial-copy { text-align: center; }
  .trial-copy p { margin-left: auto; margin-right: auto; }
  .trial-qr { max-width: 380px; margin: 0 auto; width: 100%; }
  .res-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 68px;
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    gap: 0;
    padding: 10px 5%;
    box-shadow: 0 18px 30px rgba(15, 23, 42, 0.12);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.22s ease;
  }
  .main-nav.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .main-nav a { padding: 13px 4px; border-bottom: 1px solid #f2f4f8; }
  .main-nav a::after { display: none; }
  .nav-toggle { display: flex; }

  .section { padding: 64px 0; }
  .hero { padding: 116px 0 64px; }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); justify-content: stretch; gap: 18px 12px; }
  .float-chip { display: none; }
  .value-cards { grid-template-columns: 1fr; }
  .fg-grid { grid-template-columns: 1fr; }
  .feature-chips { justify-content: flex-start; flex-wrap: nowrap; overflow-x: auto; padding: 12px 2px; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .feature-chips::-webkit-scrollbar { display: none; }
  .chip { flex: none; }
  .benefit-cards { grid-template-columns: 1fr; }
  .trial-band { padding: 34px 22px; }
  .service-cards { grid-template-columns: repeat(2, 1fr); }
  .res-grid { grid-template-columns: 1fr; }
  .page-hero { padding: 120px 0 48px; }
  .tl-theme { margin-left: 0; width: 100%; }
  .footer-inner { flex-direction: column; }
  .footer-qr { display: none; }
  .mobile-br { display: none; }
}

/* ============================================================
   v2 · 深色科技风 Hero（参考福客AI）+ 自适应导航 + 圆形悬浮按钮
   ============================================================ */

/* --- Hero 深色背景 --- */
.hero.hero-dark {
  background:
    radial-gradient(ellipse 70% 55% at 88% 12%, rgba(88, 60, 220, 0.5) 0%, transparent 62%),
    radial-gradient(ellipse 60% 50% at 12% 88%, rgba(232, 56, 13, 0.28) 0%, transparent 60%),
    linear-gradient(158deg, #05060f 0%, #090d20 42%, #171034 78%, #1d1140 100%);
  padding: 168px 0 110px;
}
.hero.hero-dark .hero-grid {
  background-image: none;
  mask-image: radial-gradient(ellipse 75% 65% at 55% 35%, #000 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 55% 35%, #000 25%, transparent 78%);
}
.hero.hero-dark::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 130px;
  background: linear-gradient(180deg, transparent 0%, #fff 96%);
  pointer-events: none;
  z-index: 2;
}
/* 3D 玻璃光晕球 */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}
.orb-main {
  width: 620px; height: 620px;
  right: -170px; top: -120px;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.85) 0%, rgba(255, 255, 255, 0) 22%),
    conic-gradient(from 220deg at 55% 45%, #6d5df6 0%, #b44cf0 24%, #ff4d6d 44%, #4527a0 68%, #1a1040 88%, #6d5df6 100%);
  filter: blur(34px);
  opacity: 0.85;
  box-shadow: inset -30px -30px 80px rgba(5, 6, 20, 0.55), inset 20px 20px 60px rgba(255, 255, 255, 0.18);
  animation: orbFloat 16s ease-in-out infinite;
}
.orb-ring {
  width: 300px; height: 300px;
  right: 8%; bottom: -60px;
  background:
    radial-gradient(circle at 35% 30%, rgba(255, 255, 255, 0.5) 0%, transparent 30%),
    conic-gradient(from 40deg at 50% 50%, #ff7a3d 0%, #ff4d6d 30%, #7c4dff 60%, #241a55 100%);
  filter: blur(30px);
  opacity: 0.4;
  animation: orbFloat 12s ease-in-out infinite reverse;
}
@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
  50% { transform: translate(-36px, 30px) rotate(18deg) scale(1.06); }
}
.hero.hero-dark .glow-red {
  width: 620px; height: 620px;
  background: rgba(255, 77, 0, 0.2);
  bottom: -280px; left: -200px; top: auto;
  opacity: 0.4;
  filter: blur(120px);
}

/* --- Hero 文案（左对齐白字） --- */
.hero.hero-dark .hero-inner { align-items: flex-start; text-align: left; }
.hero.hero-dark .hero-copy { max-width: 680px; }
.hero-badge {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.95);
  box-shadow: none;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.hero.hero-dark h1 {
  color: #fff;
  font-size: clamp(38px, 5.2vw, 64px);
  margin: 26px 0 14px;
}
.hero.hero-dark .hero-en {
  font-size: 15px;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 14px;
}
.hero.hero-dark .hero-sub {
  color: rgba(255, 255, 255, 0.62);
  font-size: 16.5px;
  margin: 0;
}
.hero.hero-dark .hero-ctas { justify-content: flex-start; margin-top: 36px; }
.btn-ghost-dark {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.28);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.btn-ghost-dark:hover { border-color: rgba(255, 255, 255, 0.6); color: #fff; transform: translateY(-2px); }

/* --- 玻璃数据条 --- */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: 100%;
  margin-top: 64px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 22px;
  backdrop-filter: blur(22px) saturate(1.4);
  -webkit-backdrop-filter: blur(22px) saturate(1.4);
  padding: 30px 12px;
  box-shadow: 0 24px 60px rgba(3, 6, 20, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}
.hero-stats li {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  border-right: 1px solid rgba(255, 255, 255, 0.14);
  transition: background 0.2s ease;
}
.hero-stats li:last-child { border-right: none; }
.hero-stats li:hover { background: rgba(255, 255, 255, 0.05); }
.hero-stats strong {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 5px;
  color: #fff;
}
.hero-stats .stat-num {
  display: inline-block;
  min-width: 2.2ch;
  text-align: center;
  font-size: clamp(34px, 3.4vw, 46px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.5px;
  font-variant-numeric: tabular-nums;
  color: #fff;
}
.hero-stats .stat-unit {
  font-size: 16px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.85);
}
.hero-stats li > span:last-child { font-size: 13px; color: rgba(255, 255, 255, 0.55); }

/* --- 导航栏深色自适应 --- */
.site-header.header-dark {
  background: linear-gradient(180deg, rgba(5, 6, 15, 0.55), rgba(5, 6, 15, 0));
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  box-shadow: none;
}
.site-header.header-dark .brand-text strong { color: #fff; }
.site-header.header-dark .brand-text small { color: rgba(255, 255, 255, 0.45); }
.site-header.header-dark .main-nav a { color: rgba(255, 255, 255, 0.82); }
.site-header.header-dark .main-nav a:hover { color: #fff; }
.site-header.header-dark .main-nav a::after { background: #ff7a3d; }
.site-header.header-dark .nav-toggle span { background: #fff; }

/* --- 圆形渐变悬浮按钮（福客风） --- */
.float-contact { gap: 16px; }
.fc-btn {
  background: none;
  border: none;
  box-shadow: none;
  border-radius: 0;
  width: auto;
  height: auto;
  gap: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.fc-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(145deg, #a78bfa 0%, #8b5cf6 45%, #6d28d9 100%);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 10px 26px rgba(124, 58, 237, 0.38), inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.fc-circle .icon { width: 24px; height: 24px; }
.fc-btn em {
  font-style: normal;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-2);
  background: #fff;
  border-radius: 999px;
  padding: 2px 10px;
  margin-top: -8px;
  position: relative;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.14);
  white-space: nowrap;
}
.fc-btn:hover .fc-circle {
  transform: scale(1.1);
  box-shadow: 0 16px 36px rgba(124, 58, 237, 0.48), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}
.fc-popup { right: 72px; }
.fc-popup[data-popup="mp"] { bottom: -4px; }
.fc-popup[data-popup="kf"] { bottom: 86px; }

/* --- 首页最新动态（星智学院预览） --- */
.section-news { background: var(--bg-soft); position: relative; overflow: hidden; }
.section-news::before {
  content: "";
  position: absolute;
  width: 460px; height: 460px;
  border-radius: 50%;
  background: #ffe4d0;
  filter: blur(90px);
  opacity: 0.5;
  top: -120px; right: -140px;
  animation: drift 18s ease-in-out infinite;
  pointer-events: none;
}
.section-news > .container { position: relative; z-index: 1; }
.news-grid {
  grid-template-columns: repeat(2, 1fr);
  max-width: 920px;
  margin: 0 auto;
}
.news-grid .res-card { border: 1px solid rgba(255, 255, 255, 0.75); }

/* --- 响应式 --- */
@media (max-width: 1080px) {
  .hero.hero-dark .hero-copy { max-width: 100%; }
  .orb-main { right: -260px; opacity: 0.42; }
}
@media (max-width: 768px) {
  .hero.hero-dark { padding: 128px 0 84px; }
  .hero.hero-dark .hero-inner { align-items: flex-start; text-align: left; }
  .hero.hero-dark .hero-ctas { justify-content: flex-start; }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px 0;
    padding: 22px 8px;
  }
  .hero-stats li:nth-child(2) { border-right: none; }
  .hero-stats li:nth-child(1), .hero-stats li:nth-child(2) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    padding-bottom: 16px;
  }
  .orb-main { width: 460px; height: 460px; right: -200px; top: -80px; }

  /* 手机端已有固定顶栏试用入口，隐藏重复悬浮入口，避免遮挡正文。 */
  .float-contact { display: none; }
  .back-to-top {
    right: 14px;
    bottom: calc(18px + env(safe-area-inset-bottom, 0px));
    width: 44px;
    height: 44px;
  }
  .back-to-top .icon { width: 15px; height: 15px; }
  /* 分类 pills 横滑右缘渐隐提示 */
  .feature-chips {
    -webkit-mask-image: linear-gradient(90deg, #000 88%, transparent 100%);
    mask-image: linear-gradient(90deg, #000 88%, transparent 100%);
  }
  /* Hero 标题防孤字 + 双按钮等宽堆叠 */
  .hero.hero-dark h1 { font-size: clamp(30px, 9vw, 36px); letter-spacing: 0; }
  .hero.hero-dark .hero-copy { padding-right: 8px; text-align: left; }
  .section-head h2 { font-size: 24px; }
  .hero.hero-dark .hero-ctas { display: grid; grid-template-columns: 1fr; gap: 12px; width: 100%; }
  .hero.hero-dark .hero-ctas .btn { justify-content: center; }
  .brand-text small { white-space: nowrap; font-size: 8.5px; letter-spacing: 1px; }
}

/* ============================================================
   v3 · 全局精细化动效（分区适配）
   ============================================================ */

/* --- Hero 载入级联 --- */
html.js .hero-dark .hero-copy > * {
  opacity: 0;
  animation: heroIn 0.85s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
}
html.js .hero-dark .hero-copy > *:nth-child(1) { animation-delay: 0.08s; }
html.js .hero-dark .hero-copy > *:nth-child(2) { animation-delay: 0.18s; }
html.js .hero-dark .hero-copy > *:nth-child(3) { animation-delay: 0.3s; }
html.js .hero-dark .hero-copy > *:nth-child(4) { animation-delay: 0.42s; }
html.js .hero-dark .hero-copy > *:nth-child(5) { animation-delay: 0.54s; }
html.js .hero-dark .hero-stats {
  opacity: 0;
  animation: heroIn 0.9s cubic-bezier(0.22, 0.61, 0.36, 1) 0.68s forwards;
}
@keyframes heroIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: none; }
}

/* --- 滚动级联容器（子元素按序入场） --- */
html.js .stagger > * {
  opacity: 1;
  transform: translateY(12px);
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: calc(var(--i, 0) * 90ms);
}
html.js .stagger.stagger-left > * { transform: translateX(-14px); }
html.js .stagger.in > * { opacity: 1; transform: none; }

/* reveal 缩放入场（大横幅专用） */
html.js .reveal.rv-zoom { transform: translateY(12px) scale(0.99); }
html.js .reveal.rv-zoom.visible { transform: none; }

/* --- 分类胶囊弹性入场 --- */
.feature-chips .chip,
.finder-nav .chip {
  animation: chipIn 0.45s cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: calc(var(--i, 0) * 35ms);
}
@keyframes chipIn {
  from { opacity: 0; transform: translateY(12px) scale(0.9); }
}

/* --- 功能卡片逐张浮现（替换整组动画） --- */
.finder-panel.swap .fg-grid { animation: none; }
.finder-panel.swap .feature-card {
  opacity: 0;
  animation: cardsIn 0.5s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
  animation-delay: calc(var(--i, 0) * 45ms);
}

/* --- FAQ 展开内容 --- */
.faq-item[open] .faq-body { animation: faqIn 0.4s ease; }
@keyframes faqIn {
  from { opacity: 0; transform: translateY(-8px); }
}

/* --- 试用区二维码轻浮动（容器整体，不干扰 hover） --- */
html.js .trial-qr { animation: qrFloat 7s ease-in-out infinite; }
@keyframes qrFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* --- 悬浮按钮呼吸浮动 --- */
.fc-btn { animation: fabBob 4.5s ease-in-out infinite; }
.float-contact .fc-btn:last-of-type { animation-delay: -2.2s; }
@keyframes fabBob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}
.back-to-top .icon { transition: transform 0.2s ease; }
.back-to-top:hover .icon { transform: translateY(-2px); }

/* --- 光晕球鼠标视差 --- */
.orb-main,
.orb-ring {
  translate: var(--px, 0) var(--py, 0);
  transition: translate 0.7s cubic-bezier(0.2, 0.6, 0.3, 1);
}

/* --- 列表项 hover 细节 --- */
.tl-item li { transition: transform 0.15s ease; }
.tl-item li:hover { transform: translateX(3px); }
.service-icon { transition: transform 0.22s ease; }
.service-card:hover .service-icon { transform: translateY(-3px) scale(1.06); }
.value-icon { transition: transform 0.22s ease; }
.value-card:hover .value-icon { transform: scale(1.08) rotate(-4deg); }

/* --- 减少动态效果：全部关闭 --- */
@media (prefers-reduced-motion: reduce) {
  html.js .hero-dark .hero-copy > *,
  html.js .hero-dark .hero-stats,
  html.js .stagger > *,
  .feature-chips .chip,
  .finder-panel .feature-card,
  .fc-btn,
  .trial-qr,
  .orb-main,
  .orb-ring,
  .glow {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ============================================================
   v4 · 首屏减色（去网格/单一蓝调/渐变标题/浅色数据条）
        + 功能速查左右分栏 + 修复杂项
   ============================================================ */

/* --- 首屏：深蓝 → 白 渐变，去网格 --- */
.hero.hero-dark {
  background:
    radial-gradient(ellipse 60% 50% at 82% 10%, rgba(88, 126, 250, 0.32) 0%, transparent 62%),
    linear-gradient(168deg, #0d1c4a 0%, #1b3a92 40%, #4568cf 72%, #c9d6f5 96%, #fff 100%);
  padding: 168px 0 130px;
}
.hero.hero-dark .hero-grid { display: none; }
.hero.hero-dark .glow-red { display: none; }
.orb-main {
  width: 560px; height: 560px;
  right: -90px; top: -90px;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0) 24%),
    radial-gradient(circle at 50% 50%, #7c9cff 0%, #4a6fd8 45%, #22409c 72%, #14285f 100%);
  opacity: 0.6;
  box-shadow: inset -40px -40px 90px rgba(8, 16, 48, 0.5), inset 24px 24px 70px rgba(255, 255, 255, 0.22), 0 30px 90px rgba(20, 45, 130, 0.3);
}
.orb-ring {
  background:
    radial-gradient(circle at 35% 30%, rgba(255, 255, 255, 0.55) 0%, transparent 30%),
    radial-gradient(circle at 50% 50%, #9db6ff 0%, #4a6fd8 55%, #22409c 100%);
  opacity: 0.42;
}

/* --- 深色首屏文字层级 --- */
.hero.hero-dark h1 { color: #fff; }
.hero.hero-dark .hl-line {
  background: none;
  -webkit-text-fill-color: currentColor;
  color: #f4f7ff;
}
.hero.hero-dark h1 em {
  background: none;
  -webkit-text-fill-color: currentColor;
  color: #ff9b5d;
  font-style: normal;
}
.hero.hero-dark .hero-sub { color: rgba(255, 255, 255, 0.88); }
.hero.hero-dark .hero-en { color: rgba(255, 255, 255, 0.55); }

/* --- 浅色玻璃数据条（福客式） --- */
.hero.hero-dark .hero-stats {
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 20px 50px rgba(20, 40, 120, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.9);
}
.hero-stats strong { color: var(--ink); }
.hero-stats .stat-num { color: var(--ink); }
.hero-stats .stat-unit { color: var(--ink-2); }
.hero-stats li > span:last-child { color: var(--muted); }
.hero-stats li { border-right: 1px solid rgba(15, 23, 42, 0.1); }
.hero-stats li:hover { background: rgba(255, 255, 255, 0.5); }

/* --- 功能速查：左侧分类栏 + 右侧内容 --- */
.finder-body {
  display: grid;
  grid-template-columns: 252px 1fr;
  gap: 30px;
  align-items: start;
}
.finder-nav {
  position: sticky;
  top: 92px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 18px;
  padding: 12px;
  box-shadow: var(--shadow-sm);
}
.finder-nav .chip {
  justify-content: flex-start;
  border-radius: 12px;
  padding: 11px 14px;
  background: transparent;
  border: 1px solid transparent;
  box-shadow: none;
  position: relative;
}
.finder-nav .chip:hover { transform: none; background: rgba(255, 77, 0, 0.06); }
.finder-nav .chip.active {
  background: rgba(255, 77, 0, 0.08);
  border-color: rgba(255, 77, 0, 0.25);
  color: var(--primary-deep);
  box-shadow: none;
}
.finder-nav .chip.active em {
  background: rgba(255, 255, 255, 0.85);
  color: #c2410c;
  font-weight: 700;
}
.finder-nav .chip.active::before {
  content: "";
  position: absolute;
  left: 0; top: 22%;
  width: 3px; height: 56%;
  border-radius: 3px;
  background: var(--primary);
}
.finder-nav .chip em { margin-left: auto; }
.finder-panel { min-height: 480px; }

/* 移动端：分类栏回退为横滑胶囊 */
@media (max-width: 900px) {
  .finder-body { grid-template-columns: 1fr; gap: 18px; }
  .finder-nav {
    position: static;
    flex-direction: row;
    overflow-x: auto;
    padding: 10px;
    border-radius: 999px;
    scrollbar-width: none;
    -webkit-mask-image: linear-gradient(90deg, #000 90%, transparent 100%);
    mask-image: linear-gradient(90deg, #000 90%, transparent 100%);
  }
  .finder-nav::-webkit-scrollbar { display: none; }
  .finder-nav .chip { flex: none; border-radius: 999px; padding: 8px 16px; }
  .finder-nav .chip.active::before { display: none; }
  .finder-panel { min-height: 320px; }
}

/* --- 服务卡细节统一 --- */
.service-cards { gap: 18px; }
.service-card { padding: 30px 18px 26px; }
.service-icon {
  width: 52px; height: 52px;
  border-radius: 15px;
  background: linear-gradient(135deg, #fff3ec, #ffe4d4);
}

/* --- 文章封面完整比例 --- */
.res-cover { aspect-ratio: 40 / 17; }

/* --- 悬浮客服按钮白化图标 --- */
.fc-img {
  width: 26px;
  height: 27px;
  filter: brightness(0) invert(1);
}

/* --- 页脚备案号链接 --- */
.icp { color: inherit; opacity: 0.75; transition: opacity 0.15s ease; }
.icp:hover { opacity: 1; color: #fff; }

@media (max-width: 768px) {
  .hero.hero-dark { padding: 128px 0 96px; }
  .hero.hero-dark h1 { font-size: clamp(30px, 8.6vw, 36px); }
  .finder-body { grid-template-columns: 1fr; gap: 18px; }
}

/* ============================================================
   v5 · 深空星辰主题：暗夜蓝紫底色 + 极光 / 星空 / 流星 / 噪点
        （首屏 Hero、学院页头、试用横幅三处深色场景统一）
   ============================================================ */

:root {
  --space-deep: #05070f;
  --space-mid: #090e22;
  --space-lift: #0e1534;
  --star-tile-sm:
    radial-gradient(1px 1px at 18% 26%, rgba(255, 255, 255, 0.9) 50%, transparent 51%),
    radial-gradient(1px 1px at 67% 12%, rgba(255, 255, 255, 0.55) 50%, transparent 51%),
    radial-gradient(1px 1px at 39% 74%, rgba(219, 230, 255, 0.7) 50%, transparent 51%),
    radial-gradient(1px 1px at 84% 63%, rgba(255, 255, 255, 0.5) 50%, transparent 51%),
    radial-gradient(1px 1px at 9% 86%, rgba(255, 255, 255, 0.65) 50%, transparent 51%),
    radial-gradient(1px 1px at 56% 44%, rgba(255, 255, 255, 0.35) 50%, transparent 51%),
    radial-gradient(1px 1px at 93% 33%, rgba(219, 230, 255, 0.55) 50%, transparent 51%),
    radial-gradient(1px 1px at 28% 8%, rgba(255, 255, 255, 0.45) 50%, transparent 51%);
  --star-tile-lg:
    radial-gradient(1.6px 1.6px at 32% 24%, rgba(255, 255, 255, 0.95) 50%, transparent 51%),
    radial-gradient(1.3px 1.3px at 76% 46%, rgba(214, 226, 255, 0.8) 50%, transparent 51%),
    radial-gradient(1.8px 1.8px at 14% 58%, rgba(255, 255, 255, 0.85) 50%, transparent 51%),
    radial-gradient(1.4px 1.4px at 60% 86%, rgba(199, 214, 255, 0.7) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 90% 16%, rgba(255, 255, 255, 0.6) 50%, transparent 51%),
    radial-gradient(1.2px 1.2px at 46% 6%, rgba(255, 255, 255, 0.5) 50%, transparent 51%),
    radial-gradient(1.4px 1.4px at 68% 70%, rgba(255, 255, 255, 0.55) 50%, transparent 51%);
  --noise-tile: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}

::selection { background: rgba(124, 92, 246, 0.28); }

/* --- 背景特效层：极光 / 星空 / 流星 / 噪点 --- */
.aurora {
  position: absolute;
  border-radius: 50%;
  filter: blur(64px);
  pointer-events: none;
  translate: var(--px, 0) var(--py, 0);
  transition: translate 0.9s cubic-bezier(0.2, 0.6, 0.3, 1);
}
.aurora-a {
  width: 760px; height: 520px;
  top: -200px; right: -160px;
  background: radial-gradient(closest-side, rgba(124, 92, 246, 0.34), rgba(124, 92, 246, 0.08) 62%, transparent 80%);
  animation: auroraDrift 24s ease-in-out infinite alternate;
}
.aurora-b {
  width: 640px; height: 460px;
  bottom: -190px; left: -180px;
  background: radial-gradient(closest-side, rgba(56, 189, 248, 0.2), rgba(56, 189, 248, 0.05) 60%, transparent 80%);
  animation: auroraDrift 28s ease-in-out infinite alternate-reverse;
}
@keyframes auroraDrift {
  0% { transform: translate(0, 0) rotate(0deg) scale(1); }
  50% { transform: translate(-44px, 28px) rotate(6deg) scale(1.08); }
  100% { transform: translate(32px, -22px) rotate(-4deg) scale(0.96); }
}

.hero-stars {
  position: absolute;
  inset: 0;
  background-repeat: repeat;
  pointer-events: none;
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.65) 45%, transparent 80%);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.65) 45%, transparent 80%);
}
.hero-stars.stars-sm {
  background-image: var(--star-tile-sm);
  background-size: 230px 230px;
  animation: twinkle 5.6s ease-in-out infinite;
}
.hero-stars.stars-lg {
  background-image: var(--star-tile-lg);
  background-size: 340px 340px;
  animation: twinkle 7.8s ease-in-out 1.8s infinite;
}
@keyframes twinkle {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 0.95; }
}

.shooting-star {
  position: absolute;
  width: 130px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.72));
  transform: rotate(-32deg);
  opacity: 0;
  pointer-events: none;
}
.ss-1 { top: 15%; right: 16%; animation: shoot 12s ease-out 2.5s infinite; }
.ss-2 { top: 33%; right: 44%; width: 90px; animation: shoot 17s ease-out 9s infinite; }
@keyframes shoot {
  0% { opacity: 0; transform: translate(0, 0) rotate(-32deg); }
  3% { opacity: 1; }
  14% { opacity: 0; transform: translate(-300px, 187px) rotate(-32deg); }
  100% { opacity: 0; transform: translate(-300px, 187px) rotate(-32deg); }
}

.hero-noise {
  position: absolute;
  inset: 0;
  background-image: var(--noise-tile);
  background-size: 180px 180px;
  opacity: 0.05;
  pointer-events: none;
}

/* --- Hero：深空底色 --- */
.hero.hero-dark {
  background:
    radial-gradient(ellipse 62% 46% at 50% 118%, rgba(59, 91, 219, 0.3) 0%, transparent 62%),
    radial-gradient(ellipse 52% 40% at 86% 8%, rgba(109, 90, 246, 0.3) 0%, transparent 58%),
    radial-gradient(ellipse 46% 38% at 6% 78%, rgba(56, 189, 248, 0.13) 0%, transparent 55%),
    linear-gradient(172deg, var(--space-deep) 0%, var(--space-mid) 40%, var(--space-lift) 74%, #0a0f2b 100%);
  padding: 168px 0 132px;
}
.hero.hero-dark .hero-inner { z-index: 3; }
.hero.hero-dark::after {
  height: 150px;
  background: linear-gradient(180deg, transparent 0%, rgba(238, 241, 250, 0.85) 82%, #fff 100%);
}

/* 首屏结构层，保留为动效元素容器。 */
.hero.hero-dark .hero-grid {
  display: block;
  background-image: none;
  mask-image: radial-gradient(ellipse 90% 66% at 55% 18%, #000 18%, transparent 74%);
  -webkit-mask-image: radial-gradient(ellipse 90% 66% at 55% 18%, #000 18%, transparent 74%);
}

/* 幻彩玻璃光晕球（星云质感） */
.orb-main {
  width: 560px; height: 560px;
  right: -110px; top: -150px;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.85) 0%, rgba(255, 255, 255, 0) 22%),
    conic-gradient(from 220deg at 55% 45%, #6d5df6 0%, #a855f7 20%, #e879f9 36%, #38bdf8 56%, #6366f1 74%, #1e1b4b 90%, #6d5df6 100%);
  filter: blur(30px);
  opacity: 0.6;
  box-shadow: inset -40px -40px 90px rgba(5, 8, 24, 0.5), inset 24px 24px 70px rgba(255, 255, 255, 0.18), 0 30px 90px rgba(88, 60, 220, 0.28);
}
.orb-ring {
  width: 300px; height: 300px;
  right: 9%; bottom: -50px;
  background:
    radial-gradient(circle at 35% 30%, rgba(255, 255, 255, 0.5) 0%, transparent 30%),
    conic-gradient(from 40deg at 50% 50%, #ff8a3d 0%, #f472b6 32%, #8b5cf6 62%, #241a55 100%);
  filter: blur(28px);
  opacity: 0.38;
}

/* Hero 文案质感 */
.hero.hero-dark h1 { letter-spacing: 0; }
.hero.hero-dark .hero-badge {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.05));
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: rgba(255, 255, 255, 0.92);
  box-shadow: 0 10px 28px rgba(4, 8, 26, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}
.hero.hero-dark .hero-badge .icon { color: #ffb26b; }
.hero.hero-dark .hl-line {
  background: none;
  color: #f4f7ff;
}
.hero.hero-dark h1 em {
  background: none;
  color: #ffad73;
  filter: none;
}
.hero.hero-dark .hero-sub { color: rgba(255, 255, 255, 0.72); }
.hero.hero-dark .hero-en { color: rgba(255, 255, 255, 0.5); }

/* 数据条：暗色玻璃 + 银辉数字 */
.hero.hero-dark .hero-stats {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.04));
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 24px 60px rgba(3, 6, 20, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
.hero-stats strong { color: #fff; }
.hero-stats .stat-num {
  color: #fff;
  background: none;
  -webkit-text-fill-color: currentColor;
  letter-spacing: 0;
}
.hero-stats .stat-unit { color: rgba(255, 255, 255, 0.82); }
.hero-stats li > span:last-child { color: rgba(255, 255, 255, 0.55); }
.hero-stats li { border-right: 1px solid rgba(255, 255, 255, 0.12); }
.hero-stats li:hover { background: rgba(255, 255, 255, 0.06); }

/* --- 试用横幅：深空卡片（呼应首屏） --- */
.trial-band {
  background:
    radial-gradient(ellipse 80% 130% at 100% 0%, rgba(124, 92, 246, 0.36) 0%, transparent 58%),
    radial-gradient(ellipse 70% 120% at 0% 100%, rgba(255, 106, 42, 0.18) 0%, transparent 55%),
    radial-gradient(ellipse 62% 48% at 50% 118%, rgba(59, 91, 219, 0.25) 0%, transparent 62%),
    linear-gradient(152deg, #0a0e24 0%, #131a40 55%, #1a2152 100%);
  border: 1px solid rgba(148, 128, 255, 0.24);
  color: #fff;
  box-shadow: 0 30px 80px rgba(8, 12, 40, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
.trial-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--star-tile-sm);
  background-size: 230px 230px;
  opacity: 0.55;
  mask-image: radial-gradient(ellipse 70% 90% at 72% 10%, #000 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 70% 90% at 72% 10%, #000 0%, transparent 72%);
  pointer-events: none;
}
.trial-copy .section-eyebrow {
  background: rgba(255, 255, 255, 0.1);
  color: #ffcd9e;
  border: 1px solid rgba(255, 255, 255, 0.16);
}
.trial-copy h2 { color: #fff; }
.trial-copy p { color: rgba(255, 255, 255, 0.72); }
.trial-copy p b { color: #ffb26b; }
.qr-item { box-shadow: 0 10px 30px rgba(3, 6, 20, 0.35); }

/* --- 学院页头：同款深空 --- */
.page-hero.hero-dark {
  background:
    radial-gradient(ellipse 60% 46% at 50% 114%, rgba(59, 91, 219, 0.26) 0%, transparent 62%),
    radial-gradient(ellipse 52% 42% at 86% 6%, rgba(109, 90, 246, 0.3) 0%, transparent 58%),
    radial-gradient(ellipse 46% 38% at 6% 80%, rgba(56, 189, 248, 0.12) 0%, transparent 55%),
    linear-gradient(172deg, var(--space-deep) 0%, var(--space-mid) 45%, var(--space-lift) 100%);
  padding: 150px 0 104px;
}
.page-hero.hero-dark::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 110px;
  background: linear-gradient(180deg, transparent 0%, rgba(238, 241, 250, 0.85) 80%, #fff 100%);
  pointer-events: none;
  z-index: 2;
}
.page-hero.hero-dark .page-hero-inner { z-index: 3; }
.page-hero.hero-dark .crumbs { color: rgba(255, 255, 255, 0.55); }
.page-hero.hero-dark .crumbs a:hover { color: #fff; }
.page-hero.hero-dark .crumbs b { color: #ffb26b; }
.page-hero.hero-dark h1 {
  color: #f4f7ff;
  background: none;
  -webkit-text-fill-color: currentColor;
  letter-spacing: 0;
}
.page-hero.hero-dark p { color: rgba(255, 255, 255, 0.68); }

/* --- 浅色区块：背景光斑换冷调（紫 / 冰蓝），与深空呼应 --- */
.section-features::before, .section-value::before { background: #e7e1ff; }
.section-features::after, .section-value::after { background: #d8e7ff; }
.section-services::before { background: #e9e3ff; }
.section-services::after { background: #d8e7ff; }
.section-news::before { background: #e7e1ff; }
.section-value {
  background:
    radial-gradient(ellipse 60% 90% at 100% 10%, #f3f0ff 0%, transparent 55%),
    linear-gradient(180deg, #fff 0%, #fff 55%, #f7f9fc 100%);
}
.finder-search:focus-within {
  border-color: #8b5cf6;
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.15);
}

/* --- 页脚：同色系深夜蓝 --- */
.site-footer {
  background: #0b0e1e;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

/* --- 响应式（覆盖前代同名规则，需重新声明） --- */
@media (max-width: 1080px) {
  .orb-main { right: -250px; opacity: 0.46; }
  .aurora-a { right: -230px; }
}
@media (max-width: 768px) {
  .hero.hero-dark { padding: 128px 0 104px; }
  .hero.hero-dark::after { height: 120px; }
  .orb-main { width: 430px; height: 430px; right: -190px; top: -110px; }
  .orb-ring { width: 220px; height: 220px; right: 4%; bottom: -36px; }
  .aurora-a { width: 540px; height: 400px; top: -170px; right: -200px; }
  .aurora-b { width: 480px; height: 360px; bottom: -170px; left: -200px; }
  .shooting-star { display: none; }
  .hero.hero-dark h1 em { filter: none; }
  .page-hero.hero-dark { padding: 120px 0 76px; }
  .page-hero.hero-dark::after { height: 90px; }
}

/* --- 减少动态效果：特效层静止 / 隐藏 --- */
@media (prefers-reduced-motion: reduce) {
  .aurora, .hero-stars { animation: none !important; }
  .aurora { translate: none !important; transition: none !important; }
  .shooting-star { display: none; }
}