/* ============================================================
   小火箭节点订阅站 · 设计系统
   风格：清爽蓝青 / 细描边卡片 / 克制投影 / 微动效
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root{
  /* 主色：蓝 → 青 */
  --blue-50:#f0f7ff; --blue-100:#dceeff; --blue-200:#b9dcff;
  --blue-300:#8cc4fb; --blue-400:#4f9bf5; --blue-500:#2483ef;
  --blue-600:#146ce0; --blue-700:#0f55b4; --blue-800:#123f80;
  /* 辅助色：青 */
  --cyan-50:#effcfd; --cyan-100:#d5f5f9; --cyan-200:#a8eaf2; --cyan-600:#0891a8;
  /* 兼容旧色名（保持配色统一） */
  --indigo-100:#e2e9ff; --indigo-600:#3f5fd6;
  --purple-500:#7c74e8; --purple-700:#4a42b4;
  /* 状态色 */
  --green-600:#0b9163;
  --amber-400:#f5b73d; --amber-500:#e39b1a;
  --rose-500:#e8586f; --teal-500:#0fa3a0;
  /* 文字与灰阶（微偏冷） */
  --ink-900:#0e1726; --ink-800:#1c2537; --ink-700:#38425a;
  --ink-600:#4d586f; --ink-500:#6c778e; --ink-400:#98a2b6;
  --gray-50:#f7f9fc; --gray-100:#eef2f7; --gray-200:#e2e8f0;
  --white:#ffffff;
  /* 渐变 */
  --grad-brand:linear-gradient(120deg,#146ce0 0%,#1a9fe0 55%,#0fb4cf 100%);
  --grad-warm:linear-gradient(120deg,#f0913c 0%,#e8664f 55%,#d9486b 100%);
  --grad-ring:linear-gradient(140deg,#146ce0,#22c3dc 45%,#7c74e8);
  /* 圆角 */
  --radius-sm:10px; --radius-lg:14px; --radius-xl:18px;
  --radius-2xl:20px; --radius-3xl:24px;
  /* 投影：更浅、更收敛 */
  --shadow-xs:0 1px 2px rgba(14,23,38,.05);
  --shadow-sm:0 1px 3px rgba(14,23,38,.05),0 1px 2px rgba(14,23,38,.04);
  --shadow-md:0 8px 24px -12px rgba(14,23,38,.14),0 2px 6px -3px rgba(14,23,38,.06);
  --shadow-lg:0 20px 44px -20px rgba(14,23,38,.2),0 6px 14px -8px rgba(14,23,38,.08);
  --header-h:66px;
}

/* ---------- 基础重置 ---------- */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--ink-700);
  background:var(--white);
  line-height:1.72;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
section{scroll-margin-top:calc(var(--header-h) + 16px)}
::selection{background:var(--blue-100);color:var(--blue-800)}
:focus-visible{outline:2px solid var(--blue-500);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media(max-width:640px){.container{padding:0 18px}}
.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}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;
  letter-spacing:.1px;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;will-change:transform;
}
.btn-primary{background:var(--blue-600);color:#fff;box-shadow:0 8px 20px -10px rgba(20,108,224,.55)}
.btn-primary:hover{background:var(--blue-700);transform:translateY(-1px);box-shadow:0 12px 26px -10px rgba(20,108,224,.6)}
.btn-gradient{background:var(--grad-brand);color:#fff;box-shadow:0 10px 24px -12px rgba(20,108,224,.6)}
.btn-gradient:hover{transform:translateY(-1px);box-shadow:0 16px 32px -14px rgba(20,108,224,.62)}
.btn-warm{background:var(--grad-warm);color:#fff;box-shadow:0 10px 24px -12px rgba(217,72,107,.5)}
.btn-warm:hover{transform:translateY(-1px);box-shadow:0 16px 32px -14px rgba(217,72,107,.55)}
.btn-outline{border:1.5px solid var(--blue-200);color:var(--blue-700);background:#fff}
.btn-outline:hover{border-color:var(--blue-500);background:var(--blue-50);transform:translateY(-1px)}
.btn-white{background:#fff;color:var(--blue-700);box-shadow:var(--shadow-sm)}
.btn-white:hover{background:var(--blue-50);transform:translateY(-1px)}
.btn-ghost-white{border:1.5px solid rgba(255,255,255,.45);color:#fff}
.btn-ghost-white:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.75);transform:translateY(-1px)}
.btn-sm{padding:9px 20px;font-size:14px;border-radius:9px}
@media(max-width:640px){.btn{width:100%;padding:14px 22px}}

/* ============================================================
   信息条 / 提示条
   ============================================================ */
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--gray-200);
  border:1px solid var(--gray-200);border-radius:var(--radius-xl);overflow:hidden}
.fact{background:#fff;padding:22px 20px;text-align:center}
.fact b{display:block;font-size:23px;font-weight:800;color:var(--blue-700);letter-spacing:-.6px;margin-bottom:3px}
.fact span{font-size:12.5px;color:var(--ink-500)}
@media(max-width:760px){.facts{grid-template-columns:1fr 1fr}}

.scene-note{
  display:flex;gap:14px;align-items:flex-start;max-width:800px;margin:0 auto;
  background:#fff;border:1px solid var(--gray-200);border-left:3px solid var(--blue-500);
  border-radius:var(--radius-lg);padding:18px 22px;box-shadow:var(--shadow-xs);
}
.scene-note svg{flex-shrink:0;width:20px;height:20px;color:var(--blue-600);margin-top:2px}
.scene-note p{font-size:14px;color:var(--ink-600);line-height:1.8}
.scene-note b{color:var(--ink-900)}

/* ============================================================
   套餐对比表
   ============================================================ */
.compare{margin-top:48px}
.compare h3{text-align:center;font-size:21px;font-weight:800;color:var(--ink-900);letter-spacing:-.3px;margin-bottom:8px}
.compare>.sub{text-align:center;font-size:14px;color:var(--ink-500);margin-bottom:26px}
.compare-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--gray-200);
  border-radius:var(--radius-xl);background:#fff;box-shadow:var(--shadow-xs)}
table.compare-table{width:100%;min-width:620px;border-collapse:collapse}
.compare-table th,.compare-table td{padding:15px 18px;text-align:center;font-size:14px;
  border-bottom:1px solid var(--gray-100);color:var(--ink-600)}
.compare-table thead th{background:var(--gray-50);font-weight:700;color:var(--ink-900);font-size:14.5px;white-space:nowrap}
.compare-table tbody th{text-align:left;font-weight:600;color:var(--ink-700);white-space:nowrap;background:#fff}
.compare-table tr:last-child th,.compare-table tr:last-child td{border-bottom:none}
.compare-table .hl{background:var(--blue-50);color:var(--blue-800);font-weight:700}
@media(max-width:640px){.compare-table th,.compare-table td{padding:13px 14px;font-size:13.5px}}

/* 服务说明列表 */
.svc-list{display:flex;flex-direction:column;gap:0;max-width:840px;margin:0 auto}
.svc-item{display:flex;gap:16px;padding:22px 0;border-bottom:1px solid var(--gray-200)}
.svc-item:last-child{border-bottom:none}
.svc-ico{
  flex-shrink:0;width:42px;height:42px;border-radius:var(--radius-lg);
  background:var(--blue-50);color:var(--blue-600);
  display:flex;align-items:center;justify-content:center;
}
.svc-ico svg{width:21px;height:21px}
.svc-item h3{font-size:16.5px;font-weight:700;color:var(--ink-900);margin-bottom:5px}
.svc-item p{font-size:14px;color:var(--ink-500);line-height:1.82}

/* 适用人群 */
.audience{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.aud-card{
  background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius-2xl);
  padding:30px 28px;box-shadow:var(--shadow-xs);
}
.aud-head{display:flex;align-items:center;gap:13px;margin-bottom:18px}
.aud-ico{
  flex-shrink:0;width:46px;height:46px;border-radius:var(--radius-lg);
  display:flex;align-items:center;justify-content:center;
}
.aud-ico svg{width:23px;height:23px}
.aud-head h3{font-size:17.5px;font-weight:700;color:var(--ink-900);margin-bottom:3px}
.aud-head span{font-size:12.5px;color:var(--ink-400)}
.aud-card ul{display:flex;flex-direction:column;gap:11px}
.aud-card li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-600);line-height:1.72}
.aud-card li svg{flex-shrink:0;width:16px;height:16px;color:var(--green-600);margin-top:3px}
@media(max-width:760px){.audience{grid-template-columns:1fr;gap:16px}}

/* 内链引导条 */
.guide-band{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  background:var(--gray-50);border:1px solid var(--gray-200);border-radius:var(--radius-xl);
  padding:24px 28px;margin-top:44px;
}
.guide-band div{max-width:640px}
.guide-band h3{font-size:17px;font-weight:700;color:var(--ink-900);margin-bottom:5px}
.guide-band p{font-size:14px;color:var(--ink-500);line-height:1.8}
@media(max-width:640px){.guide-band{padding:22px 20px}.guide-band .btn{width:100%}}

/* ---------- 区块标题 ---------- */
.sec{padding:92px 0}
.sec.alt{background:var(--gray-50)}
.sec-head{text-align:center;max-width:720px;margin:0 auto 54px}
.sec-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--blue-50);color:var(--blue-700);
  border:1px solid var(--blue-100);
  padding:6px 16px;border-radius:999px;font-size:13px;font-weight:600;
  letter-spacing:.2px;margin-bottom:18px;
}
.sec-badge.purple{background:var(--cyan-50);color:var(--cyan-600);border-color:var(--cyan-100)}
.sec-badge.purple svg{color:var(--cyan-500)}
.sec-badge svg{width:15px;height:15px}
.sec-head h2{font-size:clamp(26px,3.5vw,38px);font-weight:800;color:var(--ink-900);line-height:1.32;letter-spacing:-.4px;margin-bottom:14px}
.grad-text{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.sec-head p{font-size:16px;color:var(--ink-500);line-height:1.8}

/* 网格底纹 */
.grid-pattern{
  background-image:
    linear-gradient(rgba(20,108,224,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(20,108,224,.055) 1px,transparent 1px);
  background-size:48px 48px;
}

/* ============================================================
   顶部导航
   ============================================================ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(16px) saturate(180%);backdrop-filter:blur(16px) saturate(180%);
  border-bottom:1px solid var(--gray-200);
  transition:box-shadow .3s ease,border-color .3s ease;
}
.site-header.scrolled{box-shadow:0 8px 26px -18px rgba(14,23,38,.4);border-color:transparent}
.nav-bar{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18.5px;color:var(--ink-900);letter-spacing:-.3px}
.brand img{width:34px;height:34px;border-radius:9px;box-shadow:0 4px 12px -6px rgba(20,108,224,.55)}
.brand small{font-size:12px;font-weight:500;color:var(--ink-400);letter-spacing:.4px}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a:not(.btn){font-size:14.5px;font-weight:500;color:var(--ink-600);transition:color .2s}
.nav-links a:not(.btn):hover{color:var(--blue-600)}
.nav-toggle{display:none;width:42px;height:42px;border-radius:var(--radius-sm);color:var(--ink-700)}
.nav-toggle:hover{background:var(--blue-50)}
.nav-toggle svg{width:24px;height:24px}
.mobile-menu{
  display:none;flex-direction:column;padding:10px 24px 20px;background:#fff;border-top:1px solid var(--gray-200);
}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:13px 4px;font-size:15px;font-weight:500;color:var(--ink-700);border-bottom:1px solid var(--gray-100)}
.mobile-menu a:last-child{border-bottom:none}
.mobile-menu .btn{margin-top:12px}
@media(max-width:900px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
}

/* ============================================================
   Hero
   ============================================================ */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  padding:calc(var(--header-h) + 56px) 0 76px;overflow:hidden;
  background:linear-gradient(165deg,#fbfdff 0%,#f2f8fe 42%,#effbfd 100%);
}
.hero-bg-pattern{position:absolute;inset:0;opacity:.75;
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000 40%,transparent 100%);
  mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000 40%,transparent 100%)}
.hero-blob{position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none}
.hero-blob.b1{width:400px;height:400px;background:rgba(36,131,239,.13);top:-130px;left:-100px;animation:drift 16s ease-in-out infinite}
.hero-blob.b2{width:360px;height:360px;background:rgba(34,195,220,.12);bottom:-150px;right:-90px;animation:drift 20s ease-in-out infinite reverse}
.hero-blob.b3{width:220px;height:220px;background:rgba(20,108,224,.08);top:32%;right:14%;animation:drift 18s ease-in-out infinite}
.float-logo{position:absolute;border-radius:14px;opacity:.07;animation:pulseFloat 6s ease-in-out infinite;pointer-events:none}
.float-logo.l1{width:64px;height:64px;top:14%;left:12%}
.float-logo.l2{width:46px;height:46px;top:26%;right:16%;animation-delay:1.2s}
.float-logo.l3{width:76px;height:76px;bottom:20%;left:20%;animation-delay:2s}
.float-logo.l4{width:52px;height:52px;bottom:30%;right:10%;animation-delay:.6s}
.hero-inner{position:relative;z-index:2;text-align:center;max-width:860px;margin:0 auto}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;background:#fff;
  border:1px solid var(--blue-100);color:var(--blue-700);
  padding:7px 18px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:24px;
  box-shadow:var(--shadow-xs);
}
.hero-badge svg{color:var(--cyan-500)}
.hero h1{
  font-size:clamp(33px,5.4vw,60px);font-weight:800;line-height:1.2;color:var(--ink-900);
  letter-spacing:-1.2px;margin-bottom:20px;
}
.hero-sub{font-size:clamp(15.5px,1.6vw,18px);color:var(--ink-500);max-width:660px;margin:0 auto 32px;line-height:1.85}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:26px}
.hero-trust{display:inline-flex;align-items:center;gap:10px;font-size:13.5px;color:var(--ink-500)}
.hero-trust .stars{color:var(--amber-400);letter-spacing:2px;font-size:14px}
.hero-trust b{color:var(--ink-900)}

/* ============================================================
   套餐定价
   ============================================================ */
.pricing{
  position:relative;overflow:hidden;
  background:linear-gradient(170deg,#f8fbff 0%,#f1f7fe 55%,#effbfd 100%);
}
.pricing .grid-pattern{position:absolute;inset:0;opacity:.45}
.pricing-blob{position:absolute;border-radius:50%;filter:blur(100px);pointer-events:none}
.pricing-blob.p1{width:360px;height:360px;background:rgba(36,131,239,.16);top:-140px;left:16%;animation:pulseFloat 9s ease-in-out infinite}
.pricing-blob.p2{width:360px;height:360px;background:rgba(34,195,220,.14);bottom:-160px;right:16%;animation:pulseFloat 10s ease-in-out infinite 1s}
.plans{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.plan{
  position:relative;background:#fff;border-radius:var(--radius-3xl);
  padding:42px 30px 32px;border:1px solid var(--gray-200);
  box-shadow:var(--shadow-sm);
  transition:transform .4s cubic-bezier(.2,.8,.2,1),box-shadow .4s ease,border-color .4s ease;
  display:flex;flex-direction:column;
}
.plan:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--blue-200)}
.plan.featured{
  border:1.5px solid transparent;
  background:linear-gradient(#fff,#fff) padding-box,var(--grad-ring) border-box;
  box-shadow:0 26px 54px -26px rgba(20,108,224,.42);
  transform:scale(1.035);z-index:2;
}
.plan.featured:hover{transform:scale(1.035) translateY(-8px);box-shadow:0 32px 62px -26px rgba(20,108,224,.5)}
.plan-tag{
  position:absolute;top:-14px;left:26px;
  display:inline-flex;align-items:center;gap:6px;
  color:#fff;font-size:12px;font-weight:700;padding:6px 14px;border-radius:999px;
  letter-spacing:.2px;box-shadow:0 8px 18px -10px rgba(14,23,38,.5);
}
.plan-tag.t1{background:linear-gradient(120deg,#2483ef,#146ce0)}
.plan-tag.t2{background:linear-gradient(120deg,#22c3dc,#0891a8)}
.plan-tag.t3{background:var(--grad-warm);padding:7px 18px;font-size:13px}
.plan-tag.t3{left:50%;transform:translateX(-50%)}
.plan.featured .plan-tag.t3{top:-17px}
.plan-tag svg{width:15px;height:15px}
.plan h3{text-align:center;font-size:20px;font-weight:800;color:var(--ink-900);letter-spacing:-.3px;margin-bottom:6px}
.plan .desc{text-align:center;font-size:13.5px;color:var(--ink-500);margin-bottom:22px}
.price{text-align:center;margin-bottom:24px}
.price .sym{font-size:21px;font-weight:700;color:var(--ink-900);vertical-align:top;margin-right:2px}
.price .num{font-size:44px;font-weight:800;color:var(--ink-900);line-height:1;letter-spacing:-1.5px}
.price .per{font-size:14.5px;color:var(--ink-500);margin-left:3px}
.price .year{display:block;margin-top:8px;font-size:12.5px;color:var(--ink-400)}
.plan .btn{margin-bottom:26px}
.plan-feats{display:flex;flex-direction:column;gap:13px}
.plan-feats li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-600);line-height:1.65}
.ck{
  flex-shrink:0;width:20px;height:20px;border-radius:50%;background:#e7f8f1;
  display:inline-flex;align-items:center;justify-content:center;margin-top:2px;
}
.ck svg{width:11px;height:11px;stroke:var(--green-600);stroke-width:3;fill:none}
.plan-note{
  margin-top:20px;text-align:center;background:var(--cyan-50);
  border:1px solid var(--cyan-100);border-radius:var(--radius-lg);padding:13px 12px;
}
.plan-note b{display:block;font-size:13.5px;color:var(--cyan-600)}
.plan-note span{font-size:12.5px;color:var(--ink-500)}
@media(max-width:960px){
  .plans{grid-template-columns:1fr;max-width:440px;margin:0 auto}
  .plan.featured{transform:none;order:-1}
  .plan.featured:hover{transform:translateY(-8px)}
}

/* 套餐保障卡 */
.guarantee{
  position:relative;margin-top:52px;background:#fff;border-radius:var(--radius-3xl);
  box-shadow:var(--shadow-sm);padding:46px 42px;border:1px solid var(--gray-200);
}
.guarantee h3{text-align:center;font-size:24px;font-weight:800;color:var(--ink-900);letter-spacing:-.3px;margin-bottom:8px}
.guarantee>.sub{text-align:center;color:var(--ink-500);font-size:15px;margin-bottom:36px}
.guarantee-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.g-item{text-align:center}
.g-ico{
  width:58px;height:58px;border-radius:var(--radius-lg);margin:0 auto 15px;
  display:flex;align-items:center;justify-content:center;color:#fff;
  transition:transform .3s ease;
}
.g-item:hover .g-ico{transform:translateY(-3px)}
.g-ico svg{width:27px;height:27px}
.g-ico.c1{background:linear-gradient(120deg,#2483ef,#146ce0)}
.g-ico.c2{background:linear-gradient(120deg,#12c08a,#0b9163)}
.g-ico.c3{background:linear-gradient(120deg,#22c3dc,#0891a8)}
.g-ico.c4{background:linear-gradient(120deg,#f0913c,#d9486b)}
.g-item h4{font-size:15.5px;font-weight:700;color:var(--ink-900);margin-bottom:5px}
.g-item p{font-size:13.5px;color:var(--ink-500)}
@media(max-width:760px){.guarantee-grid{grid-template-columns:repeat(2,1fr);gap:30px 18px}.guarantee{padding:36px 22px}}

/* ============================================================
   什么是 Shadowrocket
   ============================================================ */
.about-grid{display:block}
.about-points{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.about-point{
  display:flex;flex-direction:column;gap:16px;
  background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius-xl);
  padding:30px 26px;box-shadow:var(--shadow-xs);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.about-point:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:var(--blue-200)}
.about-ico{
  flex-shrink:0;width:50px;height:50px;border-radius:var(--radius-lg);
  display:flex;align-items:center;justify-content:center;
}
.about-ico svg{width:25px;height:25px}
.about-ico.i1{background:var(--blue-50);color:var(--blue-600)}
.about-ico.i2{background:var(--cyan-50);color:var(--cyan-600)}
.about-ico.i3{background:#e7f8f1;color:var(--green-600)}
.about-point h3{font-size:18px;font-weight:700;color:var(--ink-900);letter-spacing:-.2px;margin-bottom:8px}
.about-point p{font-size:14px;color:var(--ink-500);line-height:1.82}
.why-card{
  margin-top:48px;border-radius:var(--radius-3xl);padding:42px 40px;color:#fff;
  background:linear-gradient(125deg,#0f2742 0%,#134a86 55%,#0e7f96 100%);position:relative;overflow:hidden;
}
.why-card::after{content:"";position:absolute;width:340px;height:340px;border-radius:50%;
  background:rgba(34,195,220,.22);filter:blur(60px);right:-100px;top:-130px}
.why-card h3{position:relative;font-size:22px;font-weight:800;letter-spacing:-.3px;margin-bottom:26px;text-align:center}
.why-grid{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.why-grid li{display:flex;align-items:center;gap:11px;font-size:14.5px;font-weight:500;color:#e6f2ff}
.why-grid svg{flex-shrink:0;width:20px;height:20px;color:#7fd8e8}
@media(max-width:960px){
  .about-points{grid-template-columns:1fr 1fr;gap:18px}
  .why-grid{grid-template-columns:1fr 1fr;gap:18px}
}
@media(max-width:620px){.about-points{grid-template-columns:1fr}}
@media(max-width:560px){.why-grid{grid-template-columns:1fr}}

/* ============================================================
   卡片网格
   ============================================================ */
.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.reason-card{
  background:#fff;border-radius:var(--radius-2xl);padding:32px 28px;
  box-shadow:var(--shadow-xs);border:1px solid var(--gray-200);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.reason-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:var(--blue-200)}
.reason-ico{width:46px;height:46px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.reason-ico svg{width:23px;height:23px}
.reason-card h3{font-size:17.5px;font-weight:700;color:var(--ink-900);letter-spacing:-.2px;margin-bottom:9px}
.reason-card p{font-size:14px;color:var(--ink-500);line-height:1.82}
@media(max-width:900px){.cards-grid{grid-template-columns:1fr 1fr;gap:18px}}
@media(max-width:620px){.cards-grid{grid-template-columns:1fr}}

/* ============================================================
   多端支持
   ============================================================ */
.platforms{
  background:linear-gradient(150deg,#f5f9ff,#effbfd);border-radius:var(--radius-3xl);
  padding:52px 44px;border:1px solid var(--gray-200);
}
.platform-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:34px 0 24px}
.platform{
  background:#fff;border-radius:var(--radius-xl);padding:22px 14px;text-align:center;
  box-shadow:var(--shadow-xs);border:1px solid var(--gray-200);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.platform:hover{transform:translateY(-4px);border-color:var(--blue-300);box-shadow:var(--shadow-md)}
.platform svg{width:27px;height:27px;color:var(--blue-600);margin:0 auto 9px}
.platform b{display:block;font-size:14.5px;font-weight:700;color:var(--ink-900);margin-bottom:2px}
.platform span{font-size:12px;color:var(--ink-500)}
.platforms .tip{text-align:center;font-size:13.5px;color:var(--ink-500)}
@media(max-width:760px){.platform-grid{grid-template-columns:1fr 1fr}.platforms{padding:36px 20px}}

/* ============================================================
   使用步骤
   ============================================================ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-bottom:48px}
.step{text-align:center;position:relative}
.step:not(:last-child)::after{
  content:"";position:absolute;top:37px;right:calc(-14px - 12px);width:28px;height:1.5px;
  background:repeating-linear-gradient(90deg,var(--blue-300) 0 6px,transparent 6px 12px);
}
.step-circle{
  width:76px;height:76px;border-radius:22px;background:#fff;margin:0 auto 20px;
  border:1px solid var(--gray-200);box-shadow:var(--shadow-xs);
  display:flex;align-items:center;justify-content:center;position:relative;
  transition:box-shadow .3s ease,transform .3s ease,border-color .3s ease;
}
.step:hover .step-circle{border-color:var(--blue-200);box-shadow:var(--shadow-md);transform:translateY(-4px)}
.step-circle svg{width:34px;height:34px}
.step-num{
  position:absolute;top:-8px;right:-8px;width:27px;height:27px;border-radius:50%;
  background:var(--grad-brand);color:#fff;font-size:12.5px;font-weight:800;
  display:flex;align-items:center;justify-content:center;box-shadow:0 6px 14px -8px rgba(20,108,224,.7);
}
.step h3{font-size:18px;font-weight:700;color:var(--ink-900);letter-spacing:-.2px;margin-bottom:9px}
.step p{font-size:14px;color:var(--ink-500);max-width:300px;margin:0 auto}
@media(max-width:900px){
  .steps{grid-template-columns:1fr;gap:36px}
  .step:not(:last-child)::after{display:none}
}

/* ============================================================
   用户评价
   ============================================================ */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review{
  background:#fff;border-radius:var(--radius-2xl);padding:28px;
  box-shadow:var(--shadow-xs);border:1px solid var(--gray-200);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.review:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:var(--blue-200)}
.review-head{display:flex;align-items:center;gap:13px;margin-bottom:14px}
.avatar{
  width:44px;height:44px;border-radius:50%;color:#fff;font-weight:700;font-size:15px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(130deg,#2483ef,#0891a8);
}
.review-head b{display:block;font-size:15px;color:var(--ink-900)}
.review-head span{font-size:12.5px;color:var(--ink-500)}
.stars-row{color:var(--amber-400);letter-spacing:2px;font-size:13px;margin-bottom:10px}
.review p{font-size:14px;color:var(--ink-600);line-height:1.85}
@media(max-width:900px){.reviews{grid-template-columns:1fr 1fr;gap:16px}}
@media(max-width:620px){.reviews{grid-template-columns:1fr}}

/* ============================================================
   FAQ
   ============================================================ */
.faq-list{max-width:840px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{border:1px solid var(--gray-200);border-radius:var(--radius-lg);overflow:hidden;background:#fff;transition:border-color .25s ease,box-shadow .25s ease}
.faq-item.open{border-color:var(--blue-200);box-shadow:var(--shadow-md)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:19px 22px;background:#fff;font-size:15.5px;font-weight:700;color:var(--ink-900);
  text-align:left;transition:background .25s ease;
}
.faq-q:hover{background:var(--gray-50)}
.faq-q svg{flex-shrink:0;width:20px;height:20px;color:var(--ink-400);transition:transform .3s ease,color .3s ease}
.faq-item.open .faq-q svg{transform:rotate(180deg);color:var(--blue-600)}
.faq-a{overflow:hidden;max-height:0;padding:0 22px;transition:max-height .38s ease,padding .3s ease}
.faq-a p{font-size:14.5px;color:var(--ink-600);line-height:1.9;padding-bottom:4px}

/* ============================================================
   最终 CTA
   ============================================================ */
.final-cta{
  position:relative;overflow:hidden;border-radius:var(--radius-3xl);
  background:linear-gradient(125deg,#0f2742 0%,#134a86 50%,#0e7f96 100%);
  padding:70px 32px;text-align:center;color:#fff;
}
.final-cta::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:48px 48px}
.final-cta .inner{position:relative;max-width:640px;margin:0 auto}
.final-cta h2{font-size:clamp(26px,3.5vw,38px);font-weight:800;letter-spacing:-.6px;margin-bottom:14px}
.final-cta p{color:#c9e2f8;font-size:15.5px;margin-bottom:32px;line-height:1.8}
.final-cta .actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:22px}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;overflow:hidden;color:#fff;
  background:#0d1524;
  padding:70px 0 0;
}
.site-footer::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.033) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.033) 1px,transparent 1px);
  background-size:48px 48px}
.footer-blob{position:absolute;border-radius:50%;filter:blur(100px);pointer-events:none}
.footer-blob.f1{width:380px;height:380px;background:rgba(20,108,224,.24);top:-150px;left:-90px}
.footer-blob.f2{width:360px;height:360px;background:rgba(8,145,168,.2);bottom:-170px;right:-90px}
.footer-grid{position:relative;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:52px;padding-bottom:48px}
.footer-brand .brand{color:#fff;margin-bottom:18px}
.footer-brand .brand small{color:#8296b0}
.footer-brand p{font-size:14px;color:#a9b8cc;line-height:1.9;margin-bottom:24px;max-width:360px}
.footer-trust{display:flex;flex-direction:column;gap:12px}
.footer-trust li{display:flex;align-items:center;gap:10px;font-size:13.5px;color:#a9b8cc}
.footer-trust svg{width:19px;height:19px}
.footer-trust .t-blue{color:#5fb0f7}.footer-trust .t-green{color:#3ddba4}
.site-footer h4{font-size:15.5px;font-weight:700;margin-bottom:20px}
.footer-links{display:flex;flex-direction:column;gap:13px}
.footer-links a{font-size:14px;color:#a9b8cc;transition:color .2s,padding-left .2s}
.footer-links a:hover{color:#8fd3f0;padding-left:5px}
.footer-buy{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-xl);padding:26px}
.footer-buy h4{margin-bottom:8px}
.footer-buy p{font-size:13px;color:#a9d4f5;margin-bottom:18px;line-height:1.8}
.footer-bottom{position:relative;border-top:1px solid rgba(255,255,255,.09);padding:22px 0}
.footer-bottom .row{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;font-size:12.5px;color:#8296b0}
@media(max-width:860px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:520px){.footer-grid{grid-template-columns:1fr}}

/* ============================================================
   动画
   ============================================================ */
@keyframes drift{
  0%,100%{transform:translate(0,0) scale(1)}
  50%{transform:translate(34px,26px) scale(1.1)}
}
@keyframes pulseFloat{
  0%,100%{opacity:.07;transform:scale(1)}
  50%{opacity:.12;transform:scale(1.06)}
}
@keyframes floatY{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-10px)}
}
@keyframes fadeUp{
  from{opacity:0;transform:translateY(22px)}
  to{opacity:1;transform:translateY(0)}
}
.reveal{opacity:0}
.reveal.in{animation:fadeUp .65s cubic-bezier(.2,.8,.2,1) forwards}
.reveal.d1{animation-delay:.08s}.reveal.d2{animation-delay:.16s}.reveal.d3{animation-delay:.24s}
.reveal.d4{animation-delay:.32s}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1}
}