/* ===== 变量 & 基础 ===== */
:root{
  --blue:#2AABEE; --blue-d:#1c93d1; --blue-l:#e8f6fe;
  --grad:linear-gradient(135deg,#2AABEE 0%,#229ED9 50%,#1a7fb5 100%);
  --dark:#0f1b2d; --dark2:#16263d;
  --text:#2b3445; --muted:#6b7688; --line:#e7ebf1; --bg:#fff; --bg2:#f6f9fc;
  --r:16px; --r-s:10px;
  --sh:0 4px 20px rgba(20,50,90,.07);
  --sh-h:0 14px 40px rgba(20,80,150,.16);
  --max:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.8;font-size:16px;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:.25s}
ul{list-style:none}
code{background:var(--blue-l);color:var(--blue-d);padding:2px 7px;border-radius:5px;font-size:.9em;font-family:Consolas,Monaco,monospace}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
.container.narrow{max-width:900px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.center{text-align:center}.mt-32{margin-top:32px}.mt-8{margin-top:8px}
.tiny{font-size:12px;color:var(--muted);margin-top:10px;text-align:center}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border:none;border-radius:50px;font-size:15px;font-weight:700;cursor:pointer;transition:.3s;font-family:inherit;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 6px 18px rgba(42,171,238,.32)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(42,171,238,.45)}
.btn-ghost{background:#fff;color:var(--blue-d);border:2px solid var(--blue)}
.btn-ghost:hover{background:var(--blue-l);transform:translateY(-3px)}
.btn-light{background:#fff;color:var(--blue-d)}
.btn-light:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(0,0,0,.18)}
.btn-lg{padding:15px 32px;font-size:16px}
.btn-block{width:100%}

/* ===== 顶部导航 ===== */
.site-header{position:sticky;top:0;z-index:900;background:rgba(255,255,255,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);transition:.3s}
.site-header.scrolled{box-shadow:0 4px 22px rgba(0,0,0,.07)}
.nav-wrap{display:flex;align-items:center;gap:20px;height:70px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{width:40px;height:40px;border-radius:12px;background:var(--grad);color:#fff;display:grid;place-items:center;font-size:22px;box-shadow:0 4px 12px rgba(42,171,238,.4)}
.logo-text{font-weight:900;font-size:19px;line-height:1.1;color:var(--dark);display:flex;flex-direction:column}
.logo-text small{font-size:11px;font-weight:500;color:var(--muted);letter-spacing:1px}
.main-nav{margin-left:auto}
.main-nav ul{display:flex;gap:4px}
.main-nav a{display:block;padding:9px 16px;border-radius:50px;font-weight:500;color:var(--text);font-size:15px}
.main-nav a:hover{background:var(--blue-l);color:var(--blue-d)}
.main-nav a.active{background:var(--blue-l);color:var(--blue-d);font-weight:700}
.btn-nav{padding:10px 20px;font-size:14px}
.burger{display:none;width:44px;height:44px;background:none;border:none;cursor:pointer;flex-direction:column;justify-content:center;gap:6px;align-items:center}
.burger span{width:24px;height:2.5px;background:var(--dark);border-radius:2px;transition:.3s}
.burger.on span:nth-child(1){transform:translateY(8.5px) rotate(45deg)}
.burger.on span:nth-child(2){opacity:0}
.burger.on span:nth-child(3){transform:translateY(-8.5px) rotate(-45deg)}

/* ===== 抽屉菜单 ===== */
.drawer-overlay{position:fixed;inset:0;background:rgba(10,25,45,.55);backdrop-filter:blur(3px);opacity:0;visibility:hidden;transition:.3s;z-index:998}
.drawer-overlay.on{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;right:-320px;width:300px;max-width:85vw;height:100%;background:#fff;z-index:999;display:flex;flex-direction:column;transition:right .35s cubic-bezier(.4,0,.2,1);box-shadow:-10px 0 40px rgba(0,0,0,.15)}
.drawer.on{right:0}
.drawer-head{display:flex;align-items:center;gap:10px;padding:18px 20px;border-bottom:1px solid var(--line)}
.drawer-head strong{font-size:16px;flex:1}
.drawer-close{width:36px;height:36px;border:none;background:var(--bg2);border-radius:50%;cursor:pointer;font-size:17px;color:var(--muted)}
.drawer-close:hover{background:var(--blue-l);color:var(--blue-d)}
.drawer-nav{padding:14px 12px;flex:1;overflow-y:auto}
.drawer-nav li{margin-bottom:4px}
.drawer-nav a{display:flex;align-items:center;gap:13px;padding:14px 16px;border-radius:12px;font-weight:500}
.drawer-nav a i{width:22px;color:var(--blue);font-size:17px}
.drawer-nav a:hover{background:var(--blue-l);color:var(--blue-d);transform:translateX(5px)}
.drawer-foot{padding:18px 20px;border-top:1px solid var(--line)}

/* ===== Hero ===== */
.hero{position:relative;padding:80px 0 120px;overflow:hidden;background:linear-gradient(180deg,#f2f9ff 0%,#fff 100%)}
.hero-bg{position:absolute;inset:0;background:
  radial-gradient(circle at 12% 20%,rgba(42,171,238,.14),transparent 42%),
  radial-gradient(circle at 88% 65%,rgba(34,158,217,.13),transparent 45%);
  animation:bgFloat 14s ease-in-out infinite alternate}
@keyframes bgFloat{to{transform:scale(1.12) translateY(-14px)}}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);color:var(--blue-d);padding:7px 16px;border-radius:50px;font-size:13px;font-weight:700;box-shadow:var(--sh);margin-bottom:20px}
h1{font-size:clamp(28px,4.2vw,50px);font-weight:900;line-height:1.28;color:var(--dark);letter-spacing:-.5px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:16.5px;color:var(--muted);margin:20px 0 30px;max-width:600px}
.center-lead{margin-left:auto;margin-right:auto;text-align:center}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:38px;margin-top:42px;flex-wrap:wrap}
.hero-stats b{display:block;font-size:32px;font-weight:900;color:var(--blue-d);line-height:1}
.hero-stats small{font-size:13px;color:var(--muted)}

/* 手机模型 */
.hero-visual{position:relative;display:flex;justify-content:center}
.phone-mock{width:290px;height:560px;background:#fff;border-radius:38px;border:11px solid var(--dark);box-shadow:0 30px 70px rgba(15,27,45,.28);overflow:hidden;position:relative;animation:phoneUp 5s ease-in-out infinite}
@keyframes phoneUp{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}
.phone-screen{height:100%;background:linear-gradient(180deg,#eaf5fd,#fff)}
.chat-head{display:flex;align-items:center;gap:11px;padding:22px 16px 14px;background:var(--grad);color:#fff}
.chat-head img{border-radius:50%;background:#fff;padding:3px}
.chat-head strong{display:block;font-size:14px}
.chat-head em{font-size:11px;opacity:.85;font-style:normal}
.bubbles{padding:18px 14px;display:flex;flex-direction:column;gap:12px}
.bubble{max-width:82%;padding:11px 15px;border-radius:16px;font-size:13.5px;line-height:1.6;box-shadow:0 2px 8px rgba(0,0,0,.06);opacity:0;animation:bubbleIn .55s forwards}
.bubble.in{background:#fff;border-bottom-left-radius:4px;align-self:flex-start}
.bubble.out{background:var(--grad);color:#fff;border-bottom-right-radius:4px;align-self:flex-end}
.bubble:nth-child(1){animation-delay:.5s}.bubble:nth-child(2){animation-delay:1.1s}
.bubble:nth-child(3){animation-delay:1.7s}.bubble:nth-child(4){animation-delay:2.3s}
@keyframes bubbleIn{from{opacity:0;transform:translateY(14px) scale(.94)}to{opacity:1;transform:none}}
.float-icon{position:absolute;width:56px;height:56px;border-radius:18px;background:#fff;color:var(--blue);display:grid;place-items:center;font-size:22px;box-shadow:var(--sh-h)}
.fi1{top:8%;left:2%;animation:fl 4.5s ease-in-out infinite}
.fi2{bottom:16%;left:-2%;animation:fl 5.5s ease-in-out infinite .8s;color:#27ae60}
.fi3{top:26%;right:0;animation:fl 5s ease-in-out infinite .4s;color:#f39c12}
@keyframes fl{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-20px) rotate(7deg)}}
.wave{position:absolute;bottom:-1px;left:0;width:100%;height:70px;background:#fff;
  -webkit-mask:radial-gradient(120% 100% at 50% 100%,#000 60%,transparent 61%);
  mask:radial-gradient(120% 100% at 50% 100%,#000 60%,transparent 61%)}

/* ===== 内页 Hero ===== */
.page-hero{padding:46px 0 60px;background:linear-gradient(180deg,#f2f9ff,#fff)}
.crumb{font-size:13.5px;color:var(--muted);margin-bottom:22px}
.crumb a:hover{color:var(--blue-d)}
.crumb i{margin:0 7px;font-size:11px}
.page-hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:46px;align-items:center}
.page-hero h1{font-size:clamp(26px,3.6vw,42px)}
.dl-hero{text-align:center;max-width:820px;margin:0 auto}
.dl-logo{margin:0 auto 20px;animation:phoneUp 4s ease-in-out infinite}
.dl-rating{margin-top:18px;font-size:15px;color:var(--muted)}
.dl-rating b{color:var(--dark);font-size:19px}
.stars{color:#ffc107;margin-right:8px}
.dl-tags{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:22px}
.dl-tags li{background:#fff;border:1px solid var(--line);padding:8px 16px;border-radius:50px;font-size:13.5px;font-weight:500;box-shadow:var(--sh)}
.dl-tags i{color:var(--blue);margin-right:6px}

/* Windows 模型 */
.win-mock{background:#fff;border-radius:14px;box-shadow:var(--sh-h);overflow:hidden;border:1px solid var(--line);animation:phoneUp 6s ease-in-out infinite}
.win-bar{height:34px;background:var(--bg2);display:flex;align-items:center;gap:7px;padding:0 14px;border-bottom:1px solid var(--line)}
.win-bar i{width:11px;height:11px;border-radius:50%;background:#ff5f57}
.win-bar i:nth-child(2){background:#febc2e}.win-bar i:nth-child(3){background:#28c840}
.win-body{display:flex;height:290px}
.win-side{width:38%;border-right:1px solid var(--line);padding:12px 10px;background:#fafcfe}
.win-item{display:flex;align-items:center;gap:9px;padding:9px;border-radius:9px;margin-bottom:5px}
.win-item.act{background:var(--blue-l)}
.av{width:26px;height:26px;border-radius:50%;flex-shrink:0}
.av1{background:linear-gradient(135deg,#2AABEE,#1a7fb5)}.av2{background:linear-gradient(135deg,#f7971e,#ffd200)}
.av3{background:linear-gradient(135deg,#56ab2f,#a8e063)}.av4{background:linear-gradient(135deg,#c94b4b,#f77062)}
.win-item em{height:7px;background:#e3e9f0;border-radius:4px;flex:1}
.win-chat{flex:1;padding:16px;display:flex;flex-direction:column;gap:11px;background:linear-gradient(180deg,#f3f9fe,#fff)}
.wb{height:26px;border-radius:13px;width:72%;animation:bubbleIn .6s backwards}
.wb.in{background:#e9eef4;align-self:flex-start}
.wb.out{background:var(--grad);align-self:flex-end}
.wb.short{width:45%}
.wb:nth-child(1){animation-delay:.3s}.wb:nth-child(2){animation-delay:.7s}.wb:nth-child(3){animation-delay:1.1s}
.wb:nth-child(4){animation-delay:1.5s}.wb:nth-child(5){animation-delay:1.9s}

/* 语言切换演示 */
.lang-switch-demo{background:#fff;border-radius:var(--r);box-shadow:var(--sh-h);padding:24px;border:1px solid var(--line)}
.ls-row{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px;padding:14px 8px;border-bottom:1px dashed var(--line);font-size:15px}
.ls-row:last-child{border:none}
.ls-row i{color:var(--blue);font-size:13px}
.ls-row .cn{font-weight:700;color:var(--blue-d);text-align:right}
.ls-row span:first-child{color:var(--muted)}

/* ===== 区块通用 ===== */
.section{padding:80px 0}
.section-alt{background:var(--bg2)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 50px}
.kicker{display:inline-block;color:var(--blue-d);font-weight:800;font-size:13px;letter-spacing:2px;text-transform:uppercase;margin-bottom:12px}
.kicker.light{color:#7fd4ff}
.sec-head h2{font-size:clamp(24px,3.1vw,36px);font-weight:900;color:var(--dark);line-height:1.35}
.sec-head p{color:var(--muted);margin-top:14px;font-size:15.5px}
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* 平台卡片 */
.plat-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:34px 22px;text-align:center;box-shadow:var(--sh);transition:.35s;display:block}
.plat-card:hover{transform:translateY(-9px);box-shadow:var(--sh-h);border-color:var(--blue)}
.plat-card>i{font-size:42px;color:var(--blue);margin-bottom:16px;transition:.35s}
.plat-card:hover>i{transform:scale(1.16) rotate(-6deg)}
.plat-card h3{font-size:19px;color:var(--dark);margin-bottom:6px}
.plat-card p{font-size:13.5px;color:var(--muted)}
.plat-go{display:inline-block;margin-top:14px;font-size:13.5px;font-weight:700;color:var(--blue-d)}
.plat-card:hover .plat-go i{transform:translateX(5px)}
.plat-go i{transition:.3s;margin-left:4px}

/* 特性卡片 */
.feat-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:32px 26px;box-shadow:var(--sh);transition:.35s;position:relative;overflow:hidden}
.feat-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:.4s}
.feat-card:hover::before{transform:scaleX(1)}
.feat-card:hover{transform:translateY(-7px);box-shadow:var(--sh-h)}
.feat-ico{width:58px;height:58px;border-radius:16px;display:grid;place-items:center;font-size:24px;color:#fff;margin-bottom:18px}
.ico-blue{background:linear-gradient(135deg,#2AABEE,#1a7fb5)}
.ico-green{background:linear-gradient(135deg,#43cea2,#185a9d)}
.ico-purple{background:linear-gradient(135deg,#8e2de2,#4a00e0)}
.ico-orange{background:linear-gradient(135deg,#f7971e,#ffd200)}
.ico-red{background:linear-gradient(135deg,#ee0979,#ff6a00)}
.ico-cyan{background:linear-gradient(135deg,#00c6ff,#0072ff)}
.feat-card h3{font-size:18px;color:var(--dark);margin-bottom:10px}
.feat-card p{font-size:14.5px;color:var(--muted)}

/* ===== Tabs ===== */
.tabs{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:var(--sh)}
.tab-btns{display:flex;flex-wrap:wrap;background:var(--bg2);border-bottom:1px solid var(--line)}
.tab-btn{flex:1;min-width:130px;padding:18px 14px;background:none;border:none;font-family:inherit;font-size:15px;font-weight:700;color:var(--muted);cursor:pointer;transition:.3s;display:flex;align-items:center;justify-content:center;gap:9px;border-bottom:3px solid transparent}
.tab-btn:hover{color:var(--blue-d);background:#fff}
.tab-btn.active{color:var(--blue-d);background:#fff;border-bottom-color:var(--blue)}
.tab-btn .num{width:24px;height:24px;border-radius:50%;background:var(--line);color:var(--muted);display:grid;place-items:center;font-size:12.5px;transition:.3s}
.tab-btn.active .num{background:var(--grad);color:#fff}
.tab-panes{padding:38px}
.tab-pane{display:none;animation:fadeUp .45s}
.tab-pane.active{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.tab-pane h3{font-size:21px;color:var(--dark);margin-bottom:18px}
.pane-grid{display:grid;grid-template-columns:1.4fr .6fr;gap:36px;align-items:center}
.pane-visual{display:grid;place-items:center;background:var(--blue-l);border-radius:var(--r);aspect-ratio:1/1;font-size:70px;color:var(--blue)}
.pane-visual i{animation:phoneUp 4s ease-in-out infinite}
.steps{padding-left:0;counter-reset:st;margin-bottom:22px}
.steps li{counter-increment:st;position:relative;padding-left:40px;margin-bottom:14px;font-size:15px;color:var(--muted)}
.steps li::before{content:counter(st);position:absolute;left:0;top:3px;width:26px;height:26px;border-radius:50%;background:var(--blue-l);color:var(--blue-d);display:grid;place-items:center;font-size:12.5px;font-weight:800}
.steps li b,.steps li strong{color:var(--text)}
.steps a{color:var(--blue-d);font-weight:700;border-bottom:1px dashed}

/* ===== Timeline ===== */
.timeline{max-width:880px;margin:0 auto;position:relative}
.timeline::before{content:"";position:absolute;left:23px;top:12px;bottom:12px;width:2px;background:linear-gradient(180deg,var(--blue),rgba(42,171,238,.15))}
.tl-item{display:flex;gap:24px;margin-bottom:30px;position:relative}
.tl-dot{width:48px;height:48px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:900;font-size:18px;flex-shrink:0;box-shadow:0 6px 16px rgba(42,171,238,.35);z-index:1}
.tl-body{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px 26px;flex:1;box-shadow:var(--sh);transition:.3s}
.tl-body:hover{transform:translateX(6px);box-shadow:var(--sh-h)}
.tl-body h3{font-size:18px;color:var(--dark);margin-bottom:9px}
.tl-body p{font-size:14.8px;color:var(--muted)}
.tl-body a{color:var(--blue-d);font-weight:700;border-bottom:1px dashed}

/* ===== 步骤卡片 ===== */
.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.step-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px 24px;box-shadow:var(--sh);transition:.35s;position:relative}
.step-card:hover{transform:translateY(-7px);box-shadow:var(--sh-h)}
.step-num{font-size:38px;font-weight:900;color:var(--blue-l);line-height:1;margin-bottom:8px}
.step-card h3{font-size:17px;color:var(--dark);margin-bottom:10px}
.step-card p{font-size:14.2px;color:var(--muted)}
.step-visual{display:flex;align-items:center;gap:11px;margin-top:18px;padding-top:16px;border-top:1px dashed var(--line);color:var(--blue);font-size:19px}
.step-visual i:nth-child(2){font-size:12px;color:var(--muted)}

/* ===== 下载卡片 ===== */
.dl-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 26px;box-shadow:var(--sh);transition:.35s;display:flex;flex-direction:column}
.dl-card:hover{transform:translateY(-7px);box-shadow:var(--sh-h);border-color:var(--blue)}
.dl-top{display:flex;align-items:center;gap:16px;margin-bottom:18px;padding-bottom:18px;border-bottom:1px dashed var(--line)}
.dl-top i{font-size:38px;color:var(--blue)}
.dl-top h3{font-size:19px;color:var(--dark)}
.dl-top span{font-size:13px;color:var(--muted)}
.dl-meta{margin-bottom:22px;flex:1}
.dl-meta li{font-size:14.2px;color:var(--muted);margin-bottom:10px;display:flex;gap:9px;align-items:flex-start}
.dl-meta i{color:#27ae60;margin-top:5px;font-size:12.5px}

/* 提示条 */
.notice{display:flex;gap:16px;background:var(--blue-l);border-left:4px solid var(--blue);border-radius:var(--r-s);padding:20px 24px;margin-top:32px}
.notice i{font-size:22px;color:var(--blue-d);margin-top:3px}
.notice p{font-size:14.8px;color:var(--text)}
.notice-warn{background:#fff8e6;border-left-color:#f39c12}
.notice-warn i{color:#e67e22}

/* ===== 深色区块 ===== */
.section-dark{background:linear-gradient(135deg,var(--dark) 0%,var(--dark2) 100%);color:#fff;position:relative;overflow:hidden}
.section-dark::before{content:"";position:absolute;top:-90px;right:-90px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(42,171,238,.28),transparent 70%);animation:bgFloat 9s ease-in-out infinite alternate}
.safety-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;position:relative}
.safety-grid h2{font-size:clamp(23px,3vw,34px);font-weight:900;line-height:1.4;margin-bottom:16px}
.lead-light{color:rgba(255,255,255,.72);font-size:15.5px;margin-bottom:26px}
.safety-list li{display:flex;gap:15px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:var(--r-s);padding:17px 20px;margin-bottom:13px;transition:.3s}
.safety-list li:hover{background:rgba(255,255,255,.13);transform:translateX(7px)}
.safety-list i{color:#4ade80;font-size:19px;margin-top:3px}
.safety-list b{display:block;margin-bottom:3px;font-size:15.5px}
.safety-list div{font-size:14px;color:rgba(255,255,255,.68)}

/* ===== 手风琴 ===== */
.accordion{max-width:900px;margin:0 auto}
.acc-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-s);margin-bottom:14px;overflow:hidden;transition:.3s}
.acc-item:hover{box-shadow:var(--sh)}
.acc-item.open{border-color:var(--blue);box-shadow:var(--sh)}
.acc-q{width:100%;background:none;border:none;text-align:left;padding:20px 24px;font-family:inherit;font-size:16px;font-weight:700;color:var(--dark);cursor:pointer;display:flex;align-items:center;gap:12px;line-height:1.6}
.acc-q i{margin-left:auto;color:var(--blue);transition:.35s;font-size:14px;flex-shrink:0}
.acc-item.open .acc-q i{transform:rotate(135deg)}
.q-idx{background:var(--grad);color:#fff;font-size:12px;font-weight:800;padding:3px 10px;border-radius:20px;flex-shrink:0}
.acc-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.acc-a p{padding:0 24px 20px;font-size:15px;color:var(--muted)}
.acc-a p+p{padding-top:0}
.acc-a b{color:var(--blue-d);display:block;margin-bottom:8px;font-size:15.5px}
.acc-a strong{color:var(--text)}
.acc-a a{color:var(--blue-d);font-weight:700;border-bottom:1px dashed}
.accordion-lg .acc-q{font-size:16.5px;padding:22px 26px}

/* FAQ 搜索/筛选 */
.faq-search{position:relative;max-width:520px;margin:26px auto 18px}
.faq-search i{position:absolute;left:20px;top:50%;transform:translateY(-50%);color:var(--muted)}
.faq-search input{width:100%;padding:14px 20px 14px 48px;border:2px solid var(--line);border-radius:50px;font-family:inherit;font-size:15px;outline:none;transition:.3s;background:#fff}
.faq-search input:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(42,171,238,.13)}
.faq-filter{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.chip{background:#fff;border:1px solid var(--line);padding:8px 18px;border-radius:50px;font-family:inherit;font-size:14px;font-weight:500;color:var(--muted);cursor:pointer;transition:.3s}
.chip:hover{border-color:var(--blue);color:var(--blue-d)}
.chip.active{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 5px 14px rgba(42,171,238,.3)}
.no-result{text-align:center;color:var(--muted);padding:40px;font-size:16px}
.no-result i{display:block;font-size:38px;margin-bottom:14px;color:var(--line)}

/* ===== 表格 ===== */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:#fff;box-shadow:var(--sh)}
.tg-table{width:100%;border-collapse:collapse;min-width:640px}
.tg-table th{background:var(--grad);color:#fff;padding:15px 18px;text-align:left;font-size:14.5px;font-weight:700;white-space:nowrap}
.tg-table td{padding:14px 18px;border-bottom:1px solid var(--line);font-size:14.5px;color:var(--muted)}
.tg-table tbody tr:hover{background:var(--blue-l)}
.tg-table td:first-child{color:var(--text);font-weight:500}
.tg-table i{color:var(--blue);margin-right:8px}

/* ===== CTA ===== */
.cta{background:var(--grad);padding:70px 0;position:relative;overflow:hidden}
.cta::after{content:"";position:absolute;bottom:-120px;left:-60px;width:340px;height:340px;border-radius:50%;background:rgba(255,255,255,.1);animation:bgFloat 11s ease-in-out infinite alternate}
.cta-inner{text-align:center;color:#fff;position:relative}
.cta h2{font-size:clamp(23px,3vw,34px);font-weight:900;margin-bottom:12px}
.cta p{opacity:.9;margin-bottom:28px;font-size:16px}

/* ===== 页脚 ===== */
.site-footer{background:var(--dark);color:rgba(255,255,255,.62);padding-top:60px}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px}
.logo-foot .logo-text{color:#fff}
.foot-desc{font-size:13.8px;margin-top:16px;line-height:1.9;max-width:330px}
.site-footer h4{color:#fff;font-size:15.5px;margin-bottom:18px}
.site-footer ul li{margin-bottom:11px;font-size:14px}
.site-footer a:hover{color:var(--blue);padding-left:5px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;font-size:13px;text-align:center}

/* 返回顶部 */
.to-top{position:fixed;right:24px;bottom:24px;width:48px;height:48px;border:none;border-radius:50%;background:var(--grad);color:#fff;font-size:17px;cursor:pointer;box-shadow:0 8px 22px rgba(42,171,238,.42);opacity:0;visibility:hidden;transform:translateY(18px);transition:.35s;z-index:800}
.to-top.on{opacity:1;visibility:visible;transform:none}
.to-top:hover{transform:translateY(-5px)}

/* ===== 响应式 ===== */
@media(max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .step-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:900px){
  .main-nav,.btn-nav{display:none}
  .burger{display:flex}
  .hero-inner,.page-hero-grid,.safety-grid,.pane-grid{grid-template-columns:1fr}
  .hero{padding:50px 0 90px}
  .hero-visual{order:-1;margin-bottom:26px}
  .phone-mock{width:245px;height:470px}
  .pane-visual{max-width:230px;margin:0 auto}
  .lead{margin-left:auto;margin-right:auto}
  .float-icon{width:46px;height:46px;font-size:18px}
}
@media(max-width:640px){
  body{font-size:15px}
  .section{padding:56px 0}
  .grid-3,.grid-4,.step-grid,.foot-grid{grid-template-columns:1fr}
  .hero-stats{gap:26px;justify-content:space-between;width:100%}
  .hero-stats b{font-size:26px}
  .hero-btns .btn{width:100%}
  .tab-btns{flex-direction:column}
  .tab-btn{min-width:100%;border-bottom:1px solid var(--line)}
  .tab-btn.active{border-bottom-color:var(--blue)}
  .tab-panes{padding:24px 20px}
  .timeline::before{left:18px}
  .tl-dot{width:38px;height:38px;font-size:15px}
  .tl-item{gap:15px}
  .tl-body{padding:18px 18px}
  .acc-q{font-size:15px;padding:17px 18px;flex-wrap:wrap}
  .acc-a p{padding:0 18px 18px;font-size:14.3px}
  .to-top{right:14px;bottom:14px}
  .cta{padding:52px 0}
  .dl-tags{gap:8px}
  .dl-tags li{font-size:12.5px;padding:6px 13px}
}

/* AOS 无 JS 时兜底 */
.no-js [data-aos]{opacity:1!important;transform:none!important}