/* ==========================================================================
   HelloWorld 官网模板 — 全站样式表
   设计语言：蓝白 SaaS 营销落地页 / #025BF8 主色 / 白色卡片 / 轻阴影 / 大圆角
   参考方向：helloword.com.cn（客服辅助翻译软件）
   ========================================================================== */

/* ---------- 1. 变量与重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #ffffff;
  --bg-soft: #f5f8ff;
  --bg-tint: #ecf5ff;
  --surface: #ffffff;
  --primary: #025bf8;
  --primary-2: #2f86ff;
  --primary-dark: #013fb0;
  --primary-soft: rgba(2, 91, 248, 0.08);
  --primary-line: rgba(2, 91, 248, 0.16);
  --text: #0c1b33;
  --text-2: #41536e;
  --muted: #7a8ba5;
  --line: #e4ebf6;
  --line-2: #eef2f9;
  --amber: #ff9f1c;
  --green: #12b76a;
  --dark: #081326;
  --radius: 18px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --shadow-sm: 0 4px 14px -6px rgba(12, 27, 51, 0.1);
  --shadow: 0 18px 44px -22px rgba(2, 91, 248, 0.24);
  --shadow-lg: 0 30px 70px -30px rgba(2, 91, 248, 0.32);
  --container: 1200px;
  --header-h: 72px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Inter", system-ui, -apple-system, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
}

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

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 顶部柔光背景 */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 720px;
  z-index: -1;
  background:
    radial-gradient(720px 420px at 78% -6%, rgba(2, 91, 248, 0.1), transparent 62%),
    radial-gradient(620px 380px at 4% 2%, rgba(47, 134, 255, 0.09), transparent 60%),
    linear-gradient(180deg, #f2f7ff 0%, #ffffff 78%);
  pointer-events: none;
}

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

a {
  color: inherit;
  text-decoration: none;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  line-height: 1.28;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

p {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

::selection {
  background: rgba(2, 91, 248, 0.14);
  color: var(--primary-dark);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: #f1f5fc;
}
::-webkit-scrollbar-thumb {
  background: #c8d5e8;
  border-radius: 20px;
  border: 2px solid #f1f5fc;
}
::-webkit-scrollbar-thumb:hover {
  background: #a9bcd6;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 2. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  position: relative;
  padding: 92px 0;
}

.section--tight {
  padding: 64px 0;
}

.section--soft {
  background: var(--bg-soft);
  border-top: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-2);
}

.section-head {
  max-width: 760px;
  margin: 0 auto 52px;
  text-align: center;
}

.section-head--left {
  margin-left: 0;
  text-align: left;
}

.section-head h2 {
  font-size: clamp(26px, 3.2vw, 38px);
  margin-bottom: 16px;
}

.section-head p {
  color: var(--text-2);
  font-size: 16.5px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin-bottom: 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid var(--primary-line);
  border-radius: var(--radius-pill);
}

.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

.gradient-text {
  background: linear-gradient(96deg, #025bf8 0%, #2f86ff 52%, #6aa8ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  font-size: 17.5px;
  color: var(--text-2);
}

.mono {
  font-family: var(--mono);
}

.grid {
  display: grid;
  gap: 22px;
}

.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 3. 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 26px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1;
  color: #fff;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  box-shadow: 0 10px 24px -12px rgba(2, 91, 248, 0.65);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px -12px rgba(2, 91, 248, 0.7);
}

.btn:active {
  transform: translateY(0);
}

.btn--lg {
  padding: 16px 32px;
  font-size: 16.5px;
}

.btn--ghost {
  color: var(--primary);
  background: #fff;
  border-color: #cfe0ff;
  box-shadow: var(--shadow-sm);
}

.btn--ghost:hover {
  background: var(--bg-tint);
  box-shadow: 0 10px 24px -14px rgba(2, 91, 248, 0.4);
}

.btn--white {
  color: var(--primary-dark);
  background: #fff;
  box-shadow: 0 12px 30px -14px rgba(0, 0, 0, 0.35);
}

.btn--outline-white {
  color: #fff;
  background: transparent;
  border-color: rgba(255, 255, 255, 0.55);
  box-shadow: none;
}

.btn--outline-white:hover {
  background: rgba(255, 255, 255, 0.14);
}

.btn--sm {
  padding: 10px 18px;
  font-size: 14px;
}

.btn .icon {
  width: 18px;
  height: 18px;
}

/* ---------- 4. 头部与导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-stuck {
  border-bottom-color: var(--line);
  box-shadow: 0 10px 26px -22px rgba(12, 27, 51, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-text strong {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-text small {
  font-size: 10.5px;
  color: var(--muted);
  letter-spacing: 0.12em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}

.nav a {
  position: relative;
  padding: 9px 13px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
  border-radius: 10px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav a:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.nav a.is-active {
  color: var(--primary);
  font-weight: 600;
}

.nav a.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 16px;
  height: 3px;
  margin-left: -8px;
  border-radius: 3px;
  background: var(--primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.nav-link-plain {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
}

.nav-link-plain:hover {
  color: var(--primary);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-left: auto;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  cursor: pointer;
}

.nav-toggle .icon {
  width: 22px;
  height: 22px;
}

/* ---------- 5. Hero ---------- */
.hero {
  position: relative;
  padding: 64px 0 76px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 15px;
  margin-bottom: 22px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--primary-dark);
  background: #fff;
  border: 1px solid #d5e5ff;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
}

.hero-badge .icon {
  width: 15px;
  height: 15px;
  color: var(--primary);
}

.hero h1 {
  font-size: clamp(32px, 4.4vw, 54px);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}

.hero-sub {
  max-width: 560px;
  font-size: 17.5px;
  color: var(--text-2);
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 30px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-size: 13.5px;
  color: var(--muted);
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-meta .icon {
  width: 15px;
  height: 15px;
  color: var(--green);
}

.hero-visual {
  position: relative;
}

.workbench {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.workbench-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 38px;
  padding: 0 14px;
  background: #f7faff;
  border-bottom: 1px solid var(--line);
}

.workbench-bar i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #d8e2f1;
}

.workbench-bar i:nth-child(1) { background: #ff6b6b; }
.workbench-bar i:nth-child(2) { background: #ffc93c; }
.workbench-bar i:nth-child(3) { background: #35d07f; }

.workbench-bar span {
  margin-left: 8px;
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.workbench img {
  width: 100%;
  height: auto;
}

.hero-glow {
  position: absolute;
  inset: 12% -8% -10% 8%;
  z-index: -1;
  background: radial-gradient(closest-side, rgba(2, 91, 248, 0.18), transparent 76%);
  filter: blur(12px);
}

.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 15px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 16px 34px -20px rgba(12, 27, 51, 0.4);
  animation: floatY 6s ease-in-out infinite;
}

.float-card .icon {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.float-card strong {
  display: block;
  font-size: 14.5px;
  line-height: 1.3;
}

.float-card small {
  display: block;
  font-size: 11.5px;
  color: var(--muted);
  line-height: 1.3;
}

.float-card--1 { left: -26px; bottom: 16%; }
.float-card--2 { right: -18px; top: 6%; animation-delay: 1.6s; }

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

/* ---------- 6. 渠道 / 信任条 ---------- */
.trust {
  padding: 26px 0 8px;
}

.trust p {
  text-align: center;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 18px;
}

.trust-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px 34px;
}

.trust-logos span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: #5a6c86;
  opacity: 0.85;
}

.trust-logos .icon {
  width: 20px;
  height: 20px;
  color: var(--primary);
  opacity: 0.75;
}

/* ---------- 7. 卡片与功能 ---------- */
.card {
  position: relative;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: #bcd6ff;
  box-shadow: var(--shadow);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  color: var(--primary);
  background: var(--bg-tint);
  border-radius: 14px;
}

.card-icon .icon {
  width: 24px;
  height: 24px;
}

.card h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.card p {
  font-size: 15px;
  color: var(--text-2);
}

.feature-card {
  padding: 30px 26px;
}

.feature-card .card-icon {
  background: linear-gradient(135deg, #eaf3ff, #f4f8ff);
}

/* 场景卡 */
.scenario-card {
  display: block;
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.scenario-card:hover {
  transform: translateY(-4px);
  border-color: #bcd6ff;
  box-shadow: var(--shadow);
}

.scenario-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.scenario-top .card-icon {
  width: 42px;
  height: 42px;
  margin: 0;
  border-radius: 12px;
}

.scenario-top h3 {
  font-size: 17.5px;
}

.scenario-card p {
  font-size: 14.5px;
  color: var(--text-2);
  margin-bottom: 14px;
}

.scenario-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scenario-tags span {
  padding: 3px 10px;
  font-size: 12px;
  color: var(--primary-dark);
  background: var(--bg-tint);
  border-radius: var(--radius-pill);
}

/* ---------- 8. 图文展示 ---------- */
.showcase {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 60px;
  align-items: center;
}

.showcase--reverse .showcase-media {
  order: 2;
}

.showcase-media {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.showcase-media img {
  width: 100%;
  height: auto;
}

.showcase-body .eyebrow {
  margin-bottom: 16px;
}

.showcase-body h2 {
  font-size: clamp(24px, 3vw, 34px);
  margin-bottom: 16px;
}

.showcase-body > p {
  color: var(--text-2);
  margin-bottom: 24px;
}

.check-list {
  display: grid;
  gap: 14px;
}

.check-list li {
  display: flex;
  gap: 12px;
  font-size: 15px;
  color: var(--text-2);
}

.check-list .tick {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  color: var(--primary);
  background: var(--bg-tint);
  border-radius: 50%;
}

.check-list .tick .icon {
  width: 13px;
  height: 13px;
}

.check-list strong {
  color: var(--text);
}

/* ---------- 9. 步骤 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 30px 26px 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-radius: 12px;
}

.step h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.step p {
  font-size: 14.5px;
  color: var(--text-2);
}

/* ---------- 10. 价格 ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  align-items: stretch;
}

.price-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 32px 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.price-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.price-card--featured {
  color: #fff;
  background: linear-gradient(160deg, #025bf8 0%, #1a6dff 46%, #3f8dff 100%);
  border-color: transparent;
  box-shadow: 0 30px 60px -26px rgba(2, 91, 248, 0.58);
}

.price-card--featured h3,
.price-card--featured .price,
.price-card--featured .price-was {
  color: #fff;
}

.price-badge {
  position: absolute;
  top: 18px;
  right: 20px;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-dark);
  background: #fff;
  border-radius: var(--radius-pill);
}

.price-card h3 {
  font-size: 19px;
  margin-bottom: 6px;
}

.price-desc {
  min-height: 44px;
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 18px;
}

.price-card--featured .price-desc {
  color: rgba(255, 255, 255, 0.82);
}

.price-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
}

.price {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}

.price-unit {
  font-size: 13px;
  color: var(--muted);
}

.price-card--featured .price-unit {
  color: rgba(255, 255, 255, 0.78);
}

.price-was {
  font-size: 14px;
  color: var(--muted);
  text-decoration: line-through;
}

.price-note {
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 22px;
}

.price-card--featured .price-note {
  color: rgba(255, 255, 255, 0.72);
}

.price-list {
  display: grid;
  gap: 11px;
  margin-bottom: 26px;
  font-size: 14.5px;
  color: var(--text-2);
}

.price-card--featured .price-list {
  color: rgba(255, 255, 255, 0.92);
}

.price-list li {
  display: flex;
  gap: 9px;
}

.price-list .icon {
  width: 17px;
  height: 17px;
  margin-top: 3px;
  flex-shrink: 0;
  color: var(--primary);
}

.price-card--featured .price-list .icon {
  color: #fff;
}

.price-actions {
  margin-top: auto;
}

.price-actions .btn {
  width: 100%;
}

/* ---------- 11. 数据 ---------- */
.stats-band {
  padding: 56px 0;
  background: linear-gradient(135deg, #013fb0 0%, #025bf8 58%, #2f86ff 100%);
  color: #fff;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat b {
  display: block;
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
}

.stat span {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.78);
}

/* ---------- 12. 评价 ---------- */
.quote-card {
  display: flex;
  flex-direction: column;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.quote-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 14px;
  color: var(--amber);
}

.quote-stars .icon {
  width: 16px;
  height: 16px;
}

.quote-text {
  flex: 1;
  font-size: 15px;
  color: var(--text-2);
  margin-bottom: 22px;
}

.quote-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #2f86ff, #6aa8ff);
  border-radius: 50%;
  flex-shrink: 0;
}

.quote-user strong {
  display: block;
  font-size: 14.5px;
}

.quote-user small {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
}

/* ---------- 13. 博客卡片 ---------- */
.post-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.post-card:hover {
  transform: translateY(-4px);
  border-color: #bcd6ff;
  box-shadow: var(--shadow);
}

.post-thumb {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-soft);
}

.post-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.post-card:hover .post-thumb img {
  transform: scale(1.04);
}

.post-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 22px 24px 24px;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 10px;
}

.tag {
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 500;
  color: var(--primary-dark);
  background: var(--bg-tint);
  border-radius: 6px;
}

.tag--v {
  color: #7a4bd6;
  background: #f1ebff;
}

.tag--g {
  color: #0d8f5b;
  background: #e8f9f0;
}

.post-body h3 {
  font-size: 18px;
  line-height: 1.5;
  margin-bottom: 10px;
}

.post-body h3 a:hover {
  color: var(--primary);
}

.post-body p {
  font-size: 14.5px;
  color: var(--text-2);
  margin-bottom: 18px;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

.link-arrow .icon {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.link-arrow:hover .icon {
  transform: translateX(3px);
}

/* ---------- 14. FAQ ---------- */
.faq-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 48px;
  align-items: start;
}

.faq-side {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.faq-search {
  position: relative;
  margin-bottom: 22px;
}

.faq-search .icon {
  position: absolute;
  left: 14px;
  top: 50%;
  width: 17px;
  height: 17px;
  transform: translateY(-50%);
  color: var(--muted);
  pointer-events: none;
}

.faq-search input {
  width: 100%;
  height: 46px;
  padding: 0 14px 0 40px;
  font-family: inherit;
  font-size: 14.5px;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-search input::placeholder {
  color: #9aabc2;
}

.faq-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(2, 91, 248, 0.1);
}

.faq-side nav {
  display: grid;
  gap: 4px;
  margin-bottom: 22px;
}

.faq-side nav a {
  display: block;
  padding: 10px 14px;
  font-size: 14.5px;
  color: var(--text-2);
  border-left: 3px solid transparent;
  border-radius: 0 10px 10px 0;
  transition: all 0.2s ease;
}

.faq-side nav a:hover {
  color: var(--primary);
  background: var(--bg-tint);
}

.faq-side nav a.is-active {
  color: var(--primary-dark);
  font-weight: 600;
  background: var(--bg-tint);
  border-left-color: var(--primary);
}

.faq-side-card {
  padding: 22px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.faq-side-card h3 {
  font-size: 15.5px;
  margin-bottom: 8px;
}

.faq-side-card p {
  font-size: 13.5px;
  color: var(--text-2);
  margin-bottom: 14px;
}

.faq-group {
  margin-bottom: 34px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.faq-group h2 {
  font-size: 21px;
  margin-bottom: 16px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  border-radius: 2px;
}

.faq-item {
  margin-bottom: 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-item.is-open {
  border-color: #b9d4ff;
  box-shadow: var(--shadow-sm);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 17px 20px;
  font-family: inherit;
  font-size: 15.5px;
  font-weight: 600;
  text-align: left;
  color: var(--text);
  background: none;
  border: 0;
  cursor: pointer;
}

.faq-q .icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--muted);
  transition: transform 0.28s ease, color 0.2s ease;
}

.faq-item.is-open .faq-q .icon {
  color: var(--primary);
  transform: rotate(180deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.34s ease;
}

.faq-item.is-open .faq-a {
  max-height: 900px;
}

.faq-a-inner {
  padding: 0 20px 20px;
  font-size: 14.5px;
  color: var(--text-2);
}

.faq-a-inner p + p {
  margin-top: 10px;
}

.faq-a-inner a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.faq-empty {
  display: none;
  padding: 40px 24px;
  text-align: center;
  color: var(--muted);
  background: var(--bg-soft);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
}

.faq-empty.is-visible {
  display: block;
}

/* ---------- 15. CTA 区块 ---------- */
.cta-band {
  position: relative;
  overflow: hidden;
  padding: 60px 56px;
  color: #fff;
  background: linear-gradient(135deg, #013fb0 0%, #025bf8 52%, #2f86ff 100%);
  border-radius: 28px;
  box-shadow: 0 34px 70px -30px rgba(1, 63, 176, 0.6);
}

.cta-band::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -80px;
  width: 380px;
  height: 380px;
  background: radial-gradient(closest-side, rgba(255, 255, 255, 0.22), transparent 70%);
  pointer-events: none;
}

.cta-band h2 {
  font-size: clamp(24px, 3.2vw, 36px);
  color: #fff;
  margin-bottom: 12px;
}

.cta-band p {
  max-width: 640px;
  font-size: 15.5px;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 26px;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- 16. 页脚 ---------- */
.site-footer {
  margin-top: 92px;
  padding: 64px 0 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand p {
  max-width: 320px;
  margin-top: 14px;
  font-size: 14px;
  color: var(--text-2);
}

.footer-brand .brand {
  margin-bottom: 4px;
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.footer-contact span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  font-size: 12.5px;
  color: var(--text-2);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
}

.footer-contact .icon {
  width: 15px;
  height: 15px;
  color: var(--primary);
}

.footer-col h3 {
  font-size: 14.5px;
  margin-bottom: 16px;
}

.footer-col ul {
  display: grid;
  gap: 11px;
}

.footer-col a,
.footer-col li {
  font-size: 13.8px;
  color: var(--text-2);
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-seo {
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.footer-seo h3 {
  font-size: 13.5px;
  margin-bottom: 10px;
  color: var(--text);
}

.footer-seo p {
  font-size: 12.8px;
  line-height: 1.9;
  color: var(--muted);
}

.footer-seo a {
  color: #6b7f9c;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-seo a:hover {
  color: var(--primary);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 0 22px;
  font-size: 12.8px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.footer-bottom a {
  color: var(--muted);
}

.footer-bottom a:hover {
  color: var(--primary);
}

/* ---------- 17. 面包屑 ---------- */
.breadcrumb {
  padding: 18px 0 4px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  color: #c3cfe0;
}

.breadcrumb a:hover {
  color: var(--primary);
}

/* ---------- 18. 通用页面头部 ---------- */
.page-hero {
  padding: 36px 0 46px;
}

.page-hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.page-hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 16.5px;
  color: var(--text-2);
  margin-bottom: 24px;
}

.page-hero-side {
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.mini-list {
  display: grid;
  gap: 12px;
}

.mini-list li {
  display: flex;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text-2);
}

.mini-list .icon {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  flex-shrink: 0;
  color: var(--primary);
}

/* ---------- 19. 下载页 ---------- */
.dl-tabs {
  display: inline-flex;
  padding: 5px;
  margin-bottom: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
}

.dl-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-2);
  background: none;
  border: 0;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.2s ease;
}

.dl-tab .icon {
  width: 17px;
  height: 17px;
}

.dl-tab:hover {
  color: var(--primary);
}

.dl-tab.is-active {
  color: #fff;
  font-weight: 600;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 8px 18px -10px rgba(2, 91, 248, 0.7);
}

.dl-panel {
  display: none;
}

.dl-panel.is-active {
  display: block;
  animation: fadeUp 0.35s ease both;
}

.dl-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 24px;
  align-items: start;
}

.dl-main {
  padding: 32px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.dl-main h2 {
  font-size: 23px;
  margin-bottom: 8px;
}

.dl-main > p {
  font-size: 14.5px;
  color: var(--text-2);
  margin-bottom: 22px;
}

.dl-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.dl-facts div {
  padding: 14px 16px;
  background: var(--bg-soft);
  border-radius: 12px;
}

.dl-facts dt,
.dl-facts span {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}

.dl-facts dd,
.dl-facts strong {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.dl-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
}

.dl-hash {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.dl-hash code {
  flex: 1;
  min-width: 200px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-2);
  word-break: break-all;
}

.dl-hash span {
  font-size: 12.5px;
  color: var(--muted);
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-family: inherit;
  font-size: 12.5px;
  color: var(--primary);
  background: #fff;
  border: 1px solid #cfe0ff;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.copy-btn:hover {
  background: var(--bg-tint);
}

.copy-btn.is-copied {
  color: var(--green);
  border-color: #b5ebd0;
}

.dl-note {
  display: grid;
  gap: 10px;
  margin-top: 20px;
  padding: 16px 18px;
  font-size: 13.5px;
  color: var(--text-2);
  background: var(--bg-tint);
  border-radius: 12px;
}

.dl-note li {
  display: flex;
  gap: 8px;
}

.dl-note .icon {
  width: 16px;
  height: 16px;
  margin-top: 3px;
  flex-shrink: 0;
  color: var(--primary);
}

.dl-note code,
.article-note code {
  padding: 1px 6px;
  font-family: var(--mono);
  font-size: 12.4px;
  color: var(--primary-dark);
  background: #fff;
  border-radius: 5px;
}

.dl-aside {
  display: grid;
  gap: 18px;
}

.dl-aside-card {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.dl-aside-card h3 {
  font-size: 15.5px;
  margin-bottom: 10px;
}

.dl-aside-card p {
  font-size: 13.5px;
  color: var(--text-2);
  margin-bottom: 14px;
}

.dl-aside-card .link-arrow {
  font-size: 13.5px;
}

.spec-table {
  width: 100%;
  overflow-x: auto;
}

.spec-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.spec-table th,
.spec-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--line-2);
}

.spec-table th {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--muted);
  background: var(--bg-soft);
}

.spec-table th:first-child {
  border-radius: 12px 0 0 0;
}

.spec-table th:last-child {
  border-radius: 0 12px 0 0;
}

.spec-table td {
  color: var(--text-2);
  background: #fff;
}

.spec-table tr:last-child td {
  border-bottom: 0;
}

.spec-table td:first-child {
  font-weight: 600;
  color: var(--text);
}

.spec-table tbody tr:hover td {
  background: #fbfdff;
}

.spec-wrap {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.edition-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.edition-card {
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.edition-card h3 {
  font-size: 16.5px;
  margin-bottom: 6px;
}

.edition-card .edition-price {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 10px;
}

.edition-card p {
  font-size: 13.5px;
  color: var(--text-2);
}

.changelog {
  display: grid;
  gap: 22px;
}

.log-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 22px;
  padding-bottom: 22px;
  border-bottom: 1px dashed var(--line);
}

.log-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.log-ver {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}

.log-ver time {
  font-size: 12.5px;
  font-weight: 400;
  color: var(--muted);
}

.pill-new {
  align-self: flex-start;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  background: var(--primary);
  border-radius: var(--radius-pill);
}

.log-body h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.log-body ul {
  display: grid;
  gap: 7px;
  font-size: 14px;
  color: var(--text-2);
}

.log-body li {
  display: flex;
  gap: 8px;
}

.log-body li::before {
  content: "·";
  color: var(--primary);
  font-weight: 700;
}

/* ---------- 20. 博客页 ---------- */
.blog-hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 34px;
  align-items: center;
  padding: 26px;
  margin-bottom: 42px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.blog-hero-media {
  display: block;
  overflow: hidden;
  border-radius: 14px;
  aspect-ratio: 16 / 10;
  background: var(--bg-soft);
}

.blog-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-hero h2 {
  font-size: clamp(22px, 2.8vw, 30px);
  margin: 10px 0 12px;
  line-height: 1.45;
}

.blog-hero p {
  font-size: 14.5px;
  color: var(--text-2);
  margin-bottom: 18px;
}

.blog-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 8px 16px;
  font-family: inherit;
  font-size: 13.5px;
  color: var(--text-2);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.2s ease;
}

.chip:hover {
  color: var(--primary);
  border-color: #bcd6ff;
}

.chip.is-active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 8px 18px -12px rgba(2, 91, 248, 0.8);
}

.blog-search {
  position: relative;
  min-width: 230px;
}

.blog-search .icon {
  position: absolute;
  left: 13px;
  top: 50%;
  width: 16px;
  height: 16px;
  transform: translateY(-50%);
  color: var(--muted);
  pointer-events: none;
}

.blog-search input {
  width: 100%;
  height: 42px;
  padding: 0 14px 0 38px;
  font-family: inherit;
  font-size: 14px;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  outline: none;
}

.blog-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(2, 91, 248, 0.1);
}

.article {
  max-width: 820px;
  margin: 0 auto 40px;
  padding: 44px 46px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow-sm);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.article h2 {
  font-size: clamp(24px, 3vw, 32px);
  margin-bottom: 12px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12.8px;
  color: var(--muted);
  margin-bottom: 26px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line-2);
}

.article-body h3 {
  font-size: 20px;
  margin: 30px 0 12px;
}

.article-body h4 {
  font-size: 16.5px;
  margin: 22px 0 10px;
}

.article-body p {
  font-size: 15.5px;
  color: var(--text-2);
  margin-bottom: 16px;
}

.article-body ul,
.article-body ol {
  display: grid;
  gap: 9px;
  margin-bottom: 20px;
  font-size: 15px;
  color: var(--text-2);
  padding-left: 2px;
}

.article-body ul li {
  display: flex;
  gap: 10px;
}

.article-body ul li::before {
  content: "";
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-top: 11px;
  border-radius: 50%;
  background: var(--primary);
}

.article-body ol {
  counter-reset: li;
}

.article-body ol li {
  display: flex;
  gap: 10px;
  counter-increment: li;
}

.article-body ol li::before {
  content: counter(li);
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  font-size: 12px;
  font-weight: 700;
  line-height: 22px;
  text-align: center;
  color: var(--primary);
  background: var(--bg-tint);
  border-radius: 50%;
}

.article-body strong {
  color: var(--text);
  font-weight: 600;
}

.article-body pre {
  margin: 18px 0 22px;
  padding: 20px 22px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.7;
  color: #d6e2f5;
  background: #0c1b33;
  border-radius: 14px;
}

.article-body pre code {
  font-family: var(--mono);
}

.article-body .k { color: #7fb0ff; }
.article-body .s { color: #7ee2b8; }
.article-body .c { color: #7a8ba5; }

.article-note {
  padding: 16px 18px;
  margin: 20px 0;
  font-size: 14px;
  color: var(--text-2);
  background: var(--bg-tint);
  border-left: 3px solid var(--primary);
  border-radius: 0 10px 10px 0;
}

.article-note strong {
  color: var(--primary-dark);
}

.newsletter {
  max-width: 820px;
  margin: 0 auto;
  padding: 34px 38px;
  text-align: center;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 22px;
}

.newsletter h2 {
  font-size: 21px;
  margin-bottom: 8px;
}

.newsletter p {
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 18px;
}

.newsletter-form {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.newsletter-form input {
  width: 260px;
  height: 44px;
  padding: 0 16px;
  font-family: inherit;
  font-size: 14px;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  outline: none;
}

.newsletter-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(2, 91, 248, 0.1);
}

/* ---------- 21. 关于页 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 54px;
  align-items: center;
}

.about-media {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow-lg);
}

.about-media img {
  width: 100%;
  height: auto;
}

.timeline {
  position: relative;
  display: grid;
  gap: 26px;
  padding-left: 28px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), rgba(2, 91, 248, 0.12));
}

.tl-item {
  position: relative;
}

.tl-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 14px;
  height: 14px;
  background: #fff;
  border: 3px solid var(--primary);
  border-radius: 50%;
}

.tl-item time {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--primary);
  margin-bottom: 4px;
}

.tl-item h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.tl-item p {
  font-size: 14.5px;
  color: var(--text-2);
}

.team-card {
  padding: 26px;
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.team-ava {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  margin-bottom: 14px;
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #2f86ff, #6aa8ff);
  border-radius: 50%;
}

.team-card h3 {
  font-size: 16.5px;
  margin-bottom: 4px;
}

.team-role {
  font-size: 12.8px;
  color: var(--primary);
  margin-bottom: 10px;
}

.team-card p {
  font-size: 13.5px;
  color: var(--text-2);
}

.value-card {
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.contact-item {
  display: flex;
  gap: 14px;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.contact-item .card-icon {
  width: 42px;
  height: 42px;
  margin: 0;
  border-radius: 12px;
}

.contact-item h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 13.5px;
  color: var(--text-2);
  word-break: break-all;
}

.contact-item a {
  color: var(--primary);
}

/* ---------- 22. 页内小工具 ---------- */
.icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.hide-sm {
  display: inline;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  padding: 10px 18px;
  font-size: 14px;
  color: #fff;
  background: var(--primary);
  border-radius: 10px;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: none;
}

.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 80;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  color: var(--primary);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 12px 28px -14px rgba(12, 27, 51, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.25s ease;
  cursor: pointer;
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top .icon {
  width: 20px;
  height: 20px;
}

/* ---------- 23. 动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 24. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-grid,
  .showcase,
  .blog-hero,
  .about-grid,
  .page-hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .showcase--reverse .showcase-media {
    order: 0;
  }

  .float-card--1 { left: 4px; }
  .float-card--2 { right: 4px; }

  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-top { grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-side { position: static; }
  .faq-side nav { display: flex; flex-wrap: wrap; gap: 4px; }
  .faq-side nav a { flex: 1 1 auto; border-left: 0; border-radius: 10px; }
  .faq-side nav a.is-active { border-left: 0; }
  .dl-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 520px; margin: 0 auto; }
  .edition-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 34px 20px; }
}

@media (max-width: 860px) {
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 20px 22px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -30px rgba(12, 27, 51, 0.4);
  }

  .nav.is-open {
    display: flex;
    animation: fadeUp 0.2s ease;
  }

  .nav a {
    padding: 13px 15px;
    font-size: 15px;
    border-radius: 12px;
  }

  .nav a.is-active::after {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-actions .btn,
  .nav-actions .nav-link-plain {
    display: none;
  }

  .grid-3,
  .grid-2 { grid-template-columns: 1fr; }

  .steps { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 30px; }
  .section { padding: 68px 0; }
  .cta-band { padding: 40px 28px; }
  .article { padding: 32px 24px; }
  .blog-hero { padding: 20px; }
  .hero { padding-top: 44px; }
  .contact-grid { grid-template-columns: 1fr; }
  .edition-grid { grid-template-columns: 1fr; }
  .log-item { grid-template-columns: 1fr; gap: 10px; }
  .dl-facts { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  body { font-size: 15.5px; }
  .hide-sm { display: none; }
  .container { padding: 0 18px; }
  .brand-text small { display: none; }
  .hero-actions .btn { width: 100%; }
  .hero-meta { gap: 14px; font-size: 12.6px; }
  .float-card { display: none; }
  .stats { grid-template-columns: 1fr 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .newsletter-form { flex-direction: column; }
  .newsletter-form input { width: 100%; }
  .newsletter-form .btn { width: 100%; }
  .dl-main { padding: 24px 20px; }
  .dl-tabs { width: 100%; display: flex; }
  .dl-tab { flex: 1; justify-content: center; padding: 9px 8px; font-size: 13px; }
  .dl-tab .icon { display: none; }
  .dl-facts { grid-template-columns: 1fr; }
  .dl-actions .btn { width: 100%; }
  .article-meta { gap: 10px; font-size: 12px; }
  .article-body pre { padding: 16px; font-size: 12.5px; }
  .cta-band { text-align: left; }
  .cta-actions .btn { width: 100%; }
  .section-head { margin-bottom: 36px; }
  .blog-toolbar { flex-direction: column; align-items: stretch; }
  .blog-search { min-width: 0; }
  .price-card { padding: 26px 22px; }
  .quote-card, .card, .feature-card { padding: 22px; }
}

/* ---------- 25. 可访问性与打印 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] { opacity: 1; transform: none; }
  .float-card { animation: none; }
}

@media print {
  .site-header,
  .to-top,
  .cta-band,
  .newsletter { display: none; }
  body { color: #000; background: #fff; }
}