/* ================== 基础与布局 ================== */
:root {
    --accent: #1a73e8;
    --brand: #1a73e8;
    --wrap: 1100px;
    --gap: 22px;
    --border: rgba(0, 0, 0, 0.08);
    --wa-green: #2b71ff;
    --wa-dark: #111;
    --wa-gray: #555;
  }
  
  /* 统一 box-sizing */
  * { box-sizing: border-box; }
  
  html, body { margin: 0; padding: 0; }
  
  /* ★ 重要：恢复全站背景为白色（不再给 body 加渐变/!important） */
  body {
    font: 16px/1.7 system-ui, Segoe UI, Arial;
    color: #111;
    background: #fff; /* 如需浅灰可改成 #fafbfc */
  }
  
  /* 容器 */
  .container {
    position: relative; /* 给右侧悬浮资讯定位上下文 */
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 16px;
  }
  
  /* 包装 */
  .wrap {
    max-width: var(--wrap);
    margin: 0 auto;
    padding: 0 16px;
  }
  
  a { color: var(--brand); text-decoration: none; }
  a:hover { text-decoration: underline; }
  
  h1 { margin: 0 0 16px; }
  
  /* ================== 站点头/脚 ================== */
  .site-header {
    position: fixed;
    top: 0; left: 0; width: 100%;
    backdrop-filter: blur(10px);
    background: rgba(49, 0, 75, 0.75);
    border-bottom: 1px solid var(--border);
    z-index: 999;
  }
  .site-header .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    height: 64px;
  }
  /* 导航栏文字改成白色 */
.site-header .nav a {
  color: #fff !important;
}
.site-header .nav a:hover {
  color: #f0f0f0 !important;
}
.logo {
  color: #fff !important;
}

  .logo { font-weight: 700; color: #111; display: flex; align-items: center; gap: 8px; }
  .logo img { height: 32px; }
  .nav { display: flex; gap: 20px; }
  .nav a { margin-left: 14px; font-weight: 500; color: #111; }
  
  .twitter-link { margin-left: 15px; display: flex; align-items: center; }
  .twitter-link img { width: 24px; height: 24px; display: block; }
  
  .site-main { padding: 88px 0 24px; } /* 为固定头部让出空间 */
  
  .site-footer {
    border-top: 1px solid var(--border);
    background: #fff;
    margin-top: 32px;
  }
  .site-footer .wrap { padding: 18px 0; color: #666; }
  
  /* ================== 中间 hero（你的原版保留） ================== */
  .home-hero { display: block; margin-top: 10px; }
  .home-hero__left {
    display: flex; flex-direction: column; align-items: center; text-align: center;
    max-width: 500px; margin: 0 auto;
  }
  
  /* 顶部 logo / 标题 */
  .home-logo { width:110px; height:110px; display:block; margin:6px auto 10px; }
  .home-title h1 { margin:0; font-size:36px; font-weight:500; color:#333; }
  .home-subtitle { margin:6px 0 16px; font-size:16px; color:#7b8794; }
  
  /* 设备图（透明无阴影） */
  .device-mac,
  .device-phones .phone { background: none !important; box-shadow: none !important; border: none !important; }
  
  .device-mac img {
    display:block; width:100%; max-width:400px; height:auto; margin:6px auto 8px;
    background: none !important; box-shadow: none !important; border: none !important;
  }
  
  /* 电脑版下载 */
  .desktop-link {
    display:flex; justify-content:center; align-items:center; gap:8px;
    margin:6px 0 18px; color:#2f6cd6; font-size:14px;
  }
  .desktop-link .icon{ width:16px; height:16px; }
  
  /* 双手机 */
  .device-phones {
    display:grid; grid-template-columns: repeat(2, minmax(220px, 380px));
    gap:64px; justify-content:center; align-items:start; margin:24px 0 6px;
  }
  .device-phones .phone img {
    height:300px; width:auto; display:block; margin:0 auto;
    background: none !important; box-shadow: none !important; border: none !important;
  }
  .device-phones .phone figcaption {
    display:flex; justify-content:center; align-items:center; gap:8px;
    margin-top:8px; font-size:14px; color:#2f6cd6;
  }
  .device-phones .phone figcaption .icon { width:16px; height:16px; }
  
  /* 右侧近期资讯 */
  .home-aside-floating {
    position: absolute; top: 0; right: 0; width: 280px;
  }
  .aside-box { border-left:4px solid #2f6cd6; padding-left:12px; }
  .aside-title { font-size:14px; margin:0 0 6px; color:#2f6cd6; }
  .aside-news { list-style:none; margin:0; padding:0; }
  .aside-news li{ margin:6px 0 10px; }
  .aside-news .d{ font-size:11px; color:#7a8797; margin-bottom:2px; }
  .aside-news .t{ font-size:12px; color:#1a3d7a; text-decoration:none; line-height:1.4; }
  .aside-news .t:hover{ text-decoration:underline; }
  
  /* 响应式 */
  @media (max-width: 960px){
    .home-aside-floating{ position: static; width: auto; margin: 0 0 16px 0; }
    .home-hero__left{ max-width: 92vw; }
    .device-phones{ grid-template-columns: 1fr; gap:22px; }
    .device-phones .phone img{ height:280px; }
    .home-title h1{ font-size:28px; }
    .home-logo{ width:96px; height:96px; }
  }
  
  /* ================== Why/Features 栏 ================== */
  .why-telegram { max-width: 1100px; margin: 36px auto 24px; padding: 0 16px; }
  .why-title { margin: 0 0 18px; text-align: center; font-size: 22px; line-height: 1.4; color: #1f3147; }
  .why-title span{ color:#1a73e8; }
  
  .features-grid {
    display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px 36px;
  }
  .feature-card { text-align: center; padding: 6px 8px; }
  .feature-card img {
    width: 140px; height: auto; display: block; margin: 0 auto 8px;
    image-rendering: -webkit-optimize-contrast;
    transition: transform .2s ease, filter .2s ease;
  }
  .feature-card:hover img {
    transform: translateY(-4px);
    filter: drop-shadow(0 8px 18px rgba(26,115,232,.18));
  }
  .feature-card h3 { margin: 6px 0 6px; font-size: 16px; font-weight: 600; color: #1f3147; }
  .feature-card p { margin: 0; font-size: 13px; line-height: 1.6; color: #6b7a90; }
  
  @media (max-width: 960px){
    .features-grid{ grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 24px; }
  }
  @media (max-width: 560px){
    .features-grid{ grid-template-columns: 1fr; gap: 18px; }
    .feature-card img{ width: 128px; }
  }
  
  /* 统一卡片/图文的轻浮动强调线 */
  :root { --accent: #1a73e8; }
  .device-mac, .phone { text-align: center; padding: 6px 0 18px; background: transparent !important; border: none !important; box-shadow: none !important; }
  .device-mac .art img, .phone .art img {
    display: block; margin: 0 auto; max-width: 100%; height: auto;
    background: transparent; box-shadow: none; border: none;
    transition: transform .25s ease, box-shadow .25s ease;
  }
  .device-mac:hover .art img, .phone:hover .art img { transform: translateY(-4px); box-shadow: 0 18px 48px rgba(26, 115, 232, .22); }
  .desktop-link, .phone figcaption {
    display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 12px;
    font-size: 20px; line-height: 1.2;
  }
  .desktop-link b, .phone figcaption b { color: var(--accent); font-weight: 700; }
  .icon { width: 26px; height: 26px; }
  .accent {
    height: 4px; width: 68%; margin: 14px auto 0; border-radius: 3px;
    background: var(--accent); opacity: .85; transition: width .25s ease, opacity .2s ease;
  }
  .device-mac:hover .accent, .phone:hover .accent { width: 86%; opacity: 1; }
  
  /* ================== 你的 wa-* 区块（Hero/Section/Strip） ================== */
  
  /* Hero */
  .wa-hero {
    display: flex; align-items: center; justify-content: space-between; gap: 40px;
    max-width: 1200px; margin: 40px auto 60px; padding: 0 20px;
  }
  .wa-hero__content { flex: 1; }
  .wa-hero h1 { font-size: 36px; line-height: 1.4; color: #111; margin-bottom: 20px; }
  .wa-hero h1 strong { color: #2b71ff; }
  
  .wa-badge {
    display: inline-block; font-size: 14px; color: #2b71ff;
    border: 1px solid #2b71ff; padding: 4px 10px; border-radius: 20px; margin-bottom: 10px;
  }
  .wa-hero p { font-size: 18px; color: #444; margin-bottom: 25px; line-height: 1.6; }
  
  /* 下载按钮 */
  .wa-hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }
  .wa-hero__actions.left { justify-content: flex-start; }
  
  .download-btn {
    display: flex; align-items: center; gap: 10px;
    background: #2b71ff; color: #fff; text-decoration: none; border-radius: 10px;
    padding: 12px 18px; font-size: 14px; line-height: 1.2; min-width: 180px;
    transition: background .2s ease, transform .12s ease, box-shadow .2s ease;
    box-shadow: 0 8px 18px rgba(43,113,255,.18);
  }
  .download-btn:hover { background: #1f5fe6; transform: translateY(-1px); box-shadow: 0 10px 22px rgba(43,113,255,.25); }
  .download-btn .btn-icon { width: 28px; height: 28px; }
  .download-btn span { display: flex; flex-direction: column; font-weight: 700; }
  .download-btn span small { font-size: 11px; font-weight: 600; color: rgba(255,255,255,.85); text-transform: uppercase; }
  
  /* Hero 图 */
  .wa-hero__image { flex: 1; text-align: right; }
  .wa-hero__image img { width: 500px; margin-top: -20px; }
  
  @media (max-width: 768px) {
    .wa-hero { flex-direction: column; text-align: center; }
    .wa-hero__image { text-align: center; }
    .wa-hero__image img { width: 200px; margin-top: 20px; transform: rotate(5deg); }
  }
  
  /* 说明段 */
  .whatsapp-section { text-align: center; margin: 60px auto; max-width: 900px; }
  .whatsapp-section .title { font-size: 32px; font-weight: 600; margin-bottom: 16px; color: #111; }
  .whatsapp-section .desc { font-size: 18px; color: #333; line-height: 1.8; }
  
  /* 统计卡 */
  .stats-section { max-width: 1200px; margin: 80px auto; text-align: center; padding: 0 20px; }
  .stats-title { font-size: 28px; font-weight: 700; margin-bottom: 48px; color: #111; line-height: 1.4; }
  .stats-title span { color: #2b71ff; }
  .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
  .stat-card {
    background: #f9f9f9; border-radius: 16px; padding: 32px 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05); transition: transform .2s ease, box-shadow .2s ease;
  }
  .stat-card:hover { transform: translateY(-6px); box-shadow: 0 6px 16px rgba(0,0,0,0.08); }
  .stat-number { font-size: 30px; font-weight: 800; color: #2b71ff; margin-bottom: 10px; }
  .stat-label { font-size: 16px; color: #444; }
  
  /* VPN 标题段 */
  .vpn-section { padding: 60px 20px; text-align: center; }
  .vpn-section .text-box { max-width: 800px; margin: 0 auto; }
  .vpn-section .title {
    font-size: 28px; font-weight: 700; color: #1f2a44; margin-bottom: 18px; line-height: 1.3;
  }
  .vpn-section .desc {
    font-size: 16px; color: #5f6b85; line-height: 1.8; margin: 0; white-space: pre-line;
  }
  
  /* wa-section 图文 */
  :root { --wa-green: #2b71ff; }
  .wa-section {
    max-width: 1200px; margin: 80px auto; padding: 0 20px;
    display: flex; align-items: center; gap: 40px;
  }
  .wa-section.reverse { flex-direction: row-reverse; }
  .wa-text { flex: 1; }
  .wa-text h2 { font-size: 32px; color: var(--wa-dark); margin-bottom: 16px; }
  .wa-text p { font-size: 18px; line-height: 1.6; color: var(--wa-gray); }
  .wa-text ul { margin: 16px 0; padding-left: 20px; }
  .wa-text ul li { margin-bottom: 10px; font-size: 17px; line-height: 1.6; color: var(--wa-dark); }
  .wa-text strong { color: var(--wa-green); }
  .wa-img { flex: 1; text-align: center; }
  .wa-img img { max-width: 100%; height: auto; border-radius: 12px; }
  
  @media (max-width: 768px) {
    .wa-section { flex-direction: column; text-align: center; }
    .wa-section.reverse { flex-direction: column; }
    .wa-img img { max-width: 80%; }
  }
  
  /* 条带信息区（浅色） */
  .wa-strip {
    background:#e9fbe3; border-radius:28px; padding:28px 18px 38px;
    margin:32px auto; max-width:1280px;
  }
  .wa-strip__head {
    display:flex; align-items:flex-end; justify-content:space-between; gap:16px;
    margin:0 6px 14px;
  }
  .wa-strip__title { font-size:clamp(24px,4.5vw,40px); line-height:1.15; margin:0; color:#0f1f2e; }
  .wa-strip__desc { margin:0; color:#334155; font-size:14.5px; max-width:720px; }
  .wa-strip__viewport { position:relative; display:flex; align-items:center; gap:8px; padding:8px 40px; }
  .wa-strip__viewport::before,
  .wa-strip__viewport::after{
    content:""; position:absolute; top:0; bottom:0; width:60px; pointer-events:none; transition:opacity .2s ease;
  }
  .wa-strip__viewport::before{ left:0; background:linear-gradient(90deg,#fff 45%, rgba(233,251,227,0)); opacity:0; }
  .wa-strip__viewport::after{ right:0; background:linear-gradient(-90deg,#fff 45%, rgba(233,251,227,0)); opacity:0; }
  .wa-strip__viewport.is-left::before{ opacity:1; }
  .wa-strip__viewport.is-right::after{ opacity:1; }
  
  .wa-carousel {
    display:flex; gap:16px; overflow-x:auto; scroll-snap-type:x mandatory; scroll-behavior:smooth; -webkit-overflow-scrolling:touch; padding:6px 2px;
    --visible: 4;
  }
  .wa-carousel::-webkit-scrollbar{ height:8px; }
  .wa-carousel::-webkit-scrollbar-thumb{ background:rgba(48, 36, 211, 0.35); border-radius:999px; }
  @media (max-width: 1100px){ .wa-carousel{ --visible: 3; } }
  @media (max-width: 820px){  .wa-carousel{ --visible: 2; } }
  @media (max-width: 520px){  .wa-carousel{ --visible: 1; } }
  
  .wa-item {
    flex: 0 0 calc((100% - (var(--visible) - 1) * 16px) / var(--visible));
    min-width: 240px; background:#fff; border:1px solid rgba(11, 172, 46, 0.08);
    border-radius:20px; padding:18px 16px; box-shadow:0 8px 20px rgba(24, 155, 35, 0.08);
    scroll-snap-align:start; transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease;
  }
  .wa-item:hover{ transform:translateY(-2px); box-shadow:0 12px 28px rgba(16,24,40,.12); border-color: rgba(36, 48, 211, 0.55); }
  .wa-item__title{ font-size:16.5px; margin:0 0 8px; color:#0f172a; }
  .wa-item__text{ font-size:14.5px; line-height:1.72; color:#334155; margin:0; }
  
  .wa-arrow {
    position:absolute; z-index:2; top:50%; transform:translateY(-50%);
    width:44px; height:44px; border-radius:50%; border:1px solid rgba(38, 35, 201, 0.16);
    background:#fff; color:#24d366; font-size:24px; line-height:1;
    display:flex; align-items:center; justify-content:center; cursor:pointer;
    transition:transform .12s ease, box-shadow .12s ease, border-color .12s ease;
  }
  .wa-arrow:hover{ transform:translateY(calc(-50% - 1px)); border-color:#24d366; box-shadow:0 8px 18px rgba(48, 36, 211, 0.22); }
  .wa-arrow--prev{ left:4px; }
  .wa-arrow--next{ right:4px; }
  
  /* 四列浅色页脚 */
  .wa-lite-footer{ background:transparent; color:#0b1320; }
  .wa-lite__inner{
    max-width:1280px; margin:0 auto; padding:48px 20px 56px;
    display:grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap:48px 40px;
  }
  .wa-lite__logo{ display:flex; align-items:center; gap:10px; margin-bottom:14px; }
  .wa-lite__logo-img{ height:24px; width:auto; display:block; }
  .wa-lite__logo-text{ font-size:28px; font-weight:700; letter-spacing:.2px; }
  .wa-lite__headline{ font-size:24px; font-weight:800; margin:8px 0 6px; }
  .wa-lite__sub{ margin:0; font-size:16px; color:#6b7280; }
  .wa-lite__title{ margin:0 0 16px; font-size:22px; font-weight:800; }
  .wa-lite__list{ list-style:none; margin:0; padding:0; }
  .wa-lite__link{
    display:block; padding:10px 0; font-size:18px; color:#0b1320; text-decoration:none;
    transition: color .15s ease, opacity .15s ease;
  }
  .wa-lite__link:hover{ color:#2b71ff; opacity:.9; }
  
  /* ================== SafeW 深色区（仅作用在 .sf-home） ================== */
  .sf-home{
    --sf-purple:#7b4cff;
    --sf-deep:#0b0d13;
    --sf-ink:#e9ebff;
    --sf-ink-dim:#a9b3c7;
    --sf-card:#141824;
    --sf-card-bd:rgba(255,255,255,.06);
    --sf-glow: rgba(123,76,255,.25);
  
    position: relative;
    overflow: hidden;
    border-radius: 24px;
    background:
      radial-gradient(1200px 600px at 75% 20%, rgba(123,76,255,.35), rgba(123,76,255,0) 70%),
      radial-gradient(1000px 520px at 20% 40%, rgba(255,45,85,.25), rgba(255,45,85,0) 65%),
      linear-gradient(160deg, #12141d 0%, #0b0d13 60%, #0b0d13 100%);
    color: var(--sf-ink);
    padding: 28px 18px 8px;
  }
  
  /* HERO */
  .sf-hero {
    max-width: 1280px; margin: 22px auto 26px; padding: 12px 6px;
    display: grid; grid-template-columns: 1.05fr .95fr; gap: 26px; align-items: center;
  }
  .sf-hero__text { padding: 10px 6px; }
  .sf-hero__title { font-size: clamp(32px, 5vw, 64px); line-height: 1.08; color:#fff; margin:0 0 6px; }
  .sf-logo {
    margin: 10px 0 8px; font-size: clamp(36px, 6vw, 72px); font-weight: 800; letter-spacing: .6px;
    background: linear-gradient(90deg,#7b4cff 0%, #61d3ff 55%, #a96bff 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
    text-shadow: 0 6px 22px rgba(123,76,255,.35);
  }
  .sf-hero__desc { margin:12px 0 18px; color: var(--sf-ink-dim); font-size: 15.5px; line-height: 1.9; max-width: 640px; }
  
  /* 平台按钮 */
  .sf-hero__badges { display:flex; flex-wrap:wrap; gap:12px; margin-top: 10px; }
  .sf-badge {
    display:flex; align-items:center; gap:10px; padding:10px 14px; min-width:132px;
    background:#fff; color:#0f1730; border-radius:14px; border:1px solid rgba(255,255,255,.08);
    box-shadow: 0 10px 24px rgba(0,0,0,.22);
    text-decoration:none;
    transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
  }
  .sf-badge:hover { transform: translateY(-2px); border-color: rgba(123,76,255,.45); box-shadow: 0 14px 32px rgba(123,76,255,.28); }
  .sf-badge img{ width:22px; height:22px; display:block; }
  
  /* 右侧展示图 */
  .sf-hero__shot { text-align:right; }
  .sf-hero__shot img {
    width:min(90%,520px); height:auto; display:inline-block;
    filter: drop-shadow(0 28px 90px rgba(0,0,0,.55));
  }
  
  /* 功能卡片 */
  .sf-feats { max-width: 1280px; margin: 8px auto 22px; padding: 12px 6px 28px; }
  .sf-section__title { font-size: clamp(22px, 3.6vw, 42px); color:#e8ecff; margin: 0 6px 14px; font-weight:600; }
  .sf-grid { display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
  .sf-card {
    background: var(--sf-card); border:1px solid var(--sf-card-bd); border-radius: 16px; padding: 18px 16px;
    box-shadow: 0 10px 32px rgba(0,0,0,.26);
    transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
  }
  .sf-card:hover { transform: translateY(-2px); border-color: rgba(123,76,255,.45); box-shadow: 0 14px 44px var(--sf-glow); }
  .sf-ico{ width:42px; height:42px; border-radius:12px; background:linear-gradient(135deg,#7f3bff,#49a3ff); margin-bottom:8px; }
  .sf-card__ttl{ font-size:18px; margin:8px 0 6px; color:#fff; }
  .sf-card p { margin:0; color:#b6c0da; line-height:1.8; font-size:14.5px; }
  
  /* 社区评价 */
  .sf-testis { max-width: 1280px; margin: 6px auto 16px; padding: 8px 6px 22px; }
  .sf-testis__row { display:grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
  .sf-quote { background:#12131b; border:1px solid rgba(255,255,255,.06); border-radius:18px; padding:18px; color:#c9d3ea; }
  .sf-quote__hd{ display:flex; align-items:center; gap:10px; margin-bottom:10px; }
  .sf-quote__hd img{ width:34px; height:34px; border-radius:50%; }
  
  /* CTA */
  .sf-cta {
    max-width: 1280px; margin: 4px auto 12px; padding: 18px 6px 28px;
    display:grid; grid-template-columns: 1.05fr .95fr; gap: 16px; align-items:center;
  }
  .sf-cta h2 { margin:0 0 12px; font-size: clamp(26px, 3.8vw, 48px); color:#eef2ff; font-weight:700; }
  .sf-cta__shots{ display:flex; justify-content:center; gap:24px; margin-top:14px; }
  .sf-cta__shots img{ width:240px; max-width:40%; filter:drop-shadow(0 18px 36px rgba(0,0,0,.55)); }
  
  /* 博客卡片（白底，不影响全站） */
  .sf-blog{ padding:40px 0 10px; }
  .sf-blog__grid{ display:grid; gap:22px; grid-template-columns:repeat(auto-fit,minmax(300px,1fr)); }
  .sf-post{
    display:flex; flex-direction:column; background:#fff; color:#222; text-decoration:none;
    border-radius:14px; overflow:hidden; border:1px solid #e6e9f2; box-shadow:0 4px 18px rgba(0,0,0,.05);
  }
  .sf-post__cover{ width:100%; aspect-ratio:16/9; object-fit:cover; display:block; }
  .sf-post__body{ padding:14px 16px; }
  .sf-post__date{ color:#7a8797; font-size:13px; }
  .sf-post__ttl{ margin:6px 0 6px; font-size:18px; line-height:1.5; }
  .sf-post__desc{
    color:#333; line-height:1.65;
    display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden;
  }
  /* ===== 全页深色背景（当前页专用） ===== */
  .sf-page-bg{
    position: fixed;
    inset: 0;
    z-index: -1;                /* 放到内容下面 */
    /* 跟你要的 SafeW 深色渐变一致 */
    background:
      radial-gradient(1200px 600px at 75% 20%, rgba(123,76,255,.35), rgba(123,76,255,0) 70%),
      radial-gradient(1000px 520px at 20% 40%, rgba(255,45,85,.25), rgba(255,45,85,0) 65%),
      linear-gradient(160deg, #12141d 0%, #0b0d13 60%, #0b0d13 100%);
  }
  
  /* 让中间模块透明，不要再自带一块“卡片底色”和圆角 */
  .sf-home{
    background: transparent !important;
    border-radius: 0 !important;
    padding-left: 0;
    padding-right: 0;
  }
  
  
  .sf-home,
  .sf-home p,
  .sf-home h1, .sf-home h2, .sf-home h3 {
    color: #e9ebff;
  }
  
  
  /* ===== 全页深色背景（本页专用） ===== */
  .sf-page-bg{
    position: fixed;
    inset: 0;
    z-index: -1; /* 在所有内容下方 */
    background:
      radial-gradient(1200px 600px at 75% 20%, rgba(123,76,255,.35), rgba(123,76,255,0) 70%),
      radial-gradient(1000px 520px at 20% 40%, rgba(255,45,85,.25), rgba(255,45,85,0) 65%),
      linear-gradient(160deg, #12141d 0%, #0b0d13 60%, #0b0d13 100%);
  }
  
  /* 让中间模块透明，不再有独立卡片底色/圆角 */
  .sf-home{
    background: transparent !important;
    border-radius: 0 !important;
    color: #e9ebff; /* 深色背景上的文字色 */
  }
  
  /* Hero/排版保持 */
  .sf-hero{
    position: relative;
    max-width: 1280px;
    margin: 22px auto 26px;
    padding: 12px 6px;
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 26px;
    align-items: center;
  }
  .sf-hero__title{ font-size: clamp(32px, 5vw, 64px); line-height: 1.08; margin:0 0 6px; color:#fff; }
  .sf-logo{
    margin: 10px 0 8px;
    font-size: clamp(36px, 6vw, 72px);
    font-weight: 800;
    letter-spacing: .6px;
    background: linear-gradient(90deg,#7b4cff 0%, #61d3ff 55%, #a96bff 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
    text-shadow: 0 6px 22px rgba(123,76,255,.35);
  }
  .sf-hero__desc{ margin:12px 0 18px; color:#a9b3c7; font-size:15.5px; line-height:1.9; max-width:640px; }
  .sf-hero__badges{ display:flex; flex-wrap:wrap; gap:12px; margin-top:10px; }
  .sf-badge{
    display:flex; align-items:center; gap:10px; padding:10px 14px; min-width:132px;
    background:#fff; color:#0f1730; border-radius:14px; border:1px solid rgba(255,255,255,.08);
    box-shadow: 0 10px 24px rgba(0,0,0,.22);
    text-decoration:none;
    transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
  }
  .sf-badge:hover{ transform: translateY(-2px); border-color: rgba(123,76,255,.45); box-shadow: 0 14px 32px rgba(123,76,255,.28); }
  .sf-badge img{ width:22px; height:22px; display:block; }
  .sf-hero__shot{ text-align:right; }
  .sf-hero__shot img{ width:min(90%,520px); height:auto; display:inline-block; filter: drop-shadow(0 28px 90px rgba(0,0,0,.55)); }
  
  /* 功能卡片/评价/博客（与你前面发的 sf-* 保持一致） */
  .sf-section__title{ font-size: clamp(22px, 3.6vw, 42px); color:#e8ecff; margin: 0 6px 14px; font-weight:600; }
  .sf-feats{ max-width:1280px; margin:8px auto 22px; padding:12px 6px 28px; }
  .sf-grid{ display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap:16px; }
  .sf-card{ background:#141824; border:1px solid rgba(255,255,255,.06); border-radius:16px; padding:18px 16px; box-shadow:0 10px 32px rgba(0,0,0,.26); }
  .sf-ico{ width:42px; height:42px; border-radius:12px; background:linear-gradient(135deg,#7f3bff,#49a3ff); margin-bottom:8px; }
  .sf-card__ttl{ font-size:18px; margin:8px 0 6px; color:#fff; }
  .sf-card p{ margin:0; color:#b6c0da; line-height:1.8; font-size:14.5px; }
  
  .sf-testis{ max-width:1280px; margin:6px auto 16px; padding:8px 6px 22px; }
  .sf-testis__row{ display:grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap:18px; }
  .sf-quote{ background:#12131b; border:1px solid rgba(255,255,255,.06); border-radius:18px; padding:18px; color:#c9d3ea; }
  .sf-quote__hd{ display:flex; align-items:center; gap:10px; margin-bottom:10px; }
  .sf-quote__hd img{ width:34px; height:34px; border-radius:50%; }
  
  .sf-cta{ max-width:1280px; margin:4px auto 12px; padding:18px 6px 28px; display:grid; grid-template-columns:1.05fr .95fr; gap:16px; align-items:center; }
  .sf-cta h2{ margin:0 0 12px; font-size:clamp(26px, 3.8vw, 48px); color:#eef2ff; font-weight:700; }
  .sf-cta__shots{ display:flex; justify-content:center; gap:24px; margin-top:14px; }
  .sf-cta__shots img{ width:240px; max-width:40%; filter:drop-shadow(0 18px 36px rgba(0,0,0,.55)); }
  
  .sf-blog{ padding:40px 0 10px; }
  .sf-blog__grid{ display:grid; gap:22px; grid-template-columns:repeat(auto-fit,minmax(300px,1fr)); }
  .sf-post{ display:flex; flex-direction:column; background:#fff; color:#222; text-decoration:none; border-radius:14px; overflow:hidden; border:1px solid #e6e9f2; box-shadow:0 4px 18px rgba(0,0,0,.05); }
  .sf-post__cover{ width:100%; aspect-ratio:16/9; object-fit:cover; }
  .sf-post__body{ padding:14px 16px; }
  .sf-post__date{ color:#7a8797; font-size:13px; }
  .sf-post__ttl{ margin:6px 0 6px; font-size:18px; }
  .sf-post__desc{ color:#333; line-height:1.65; display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden; }
  
  /* 响应式 */
  @media (max-width: 980px){
    .sf-hero, .sf-cta{ grid-template-columns: 1fr; text-align:center; }
    .sf-hero__shot img{ width:min(86%,520px); }
    .sf-grid{ grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 620px){
    .sf-grid{ grid-template-columns: 1fr; }
    .sf-badge{ min-width: 128px; }
  }