/* ===========================================================
   贪吃蛇红包 · 落地页样式
   风格：糖果游戏风（明快渐变 + 大圆角 + 立体按钮）
   =========================================================== */

/* ===== 1. 设计变量 ===== */
:root{
  /* 底色与文字 */
  --bg:#EDF3FF;
  --surface:#FFFFFF;
  --surface-2:#F5F9FF;
  --line:#DFE9FA;
  --line-2:#CBD9F2;
  --ink:#16203A;
  --ink-2:#4C5B7C;
  --ink-3:#8795B4;

  /* 主色：蛇红 / 金币金 / 天空蓝 / 薄荷绿 / 葡萄紫 */
  --red:#FF4B4B;
  --red-deep:#D62E2E;
  --orange:#FF8A3D;
  --gold:#FFC22E;
  --gold-deep:#E79500;
  --blue:#35C4FF;
  --blue-deep:#1E93D6;
  --mint:#3ED598;
  --purple:#8B5CF6;
  --purple-deep:#6B3DE0;

  /* 渐变 */
  --grad-warm:linear-gradient(135deg,#FF8A3D 0%,#FF4B4B 52%,#E03131 100%);
  --grad-gold:linear-gradient(135deg,#FFD75E 0%,#FFC22E 45%,#F0A100 100%);
  --grad-cool:linear-gradient(135deg,#63DCFF 0%,#35C4FF 48%,#7B6BFF 100%);
  --grad-ink:linear-gradient(140deg,#2A3A66 0%,#1B2749 55%,#141C36 100%);
  --text-grad:linear-gradient(120deg,#FF8A3D 0%,#FF4B4B 55%,#E03131 100%);

  /* 圆角与阴影 */
  --radius:20px;
  --radius-lg:28px;
  --radius-xl:36px;
  --shadow-sm:0 10px 22px -14px rgba(22,32,58,.42);
  --shadow:0 24px 48px -30px rgba(22,32,58,.55);
  --shadow-lg:0 40px 80px -40px rgba(22,32,58,.6);

  color-scheme:light;
}

/* ===== 2. 基础重置 ===== */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  background-color:var(--bg);
  background-image:
    radial-gradient(circle at 6% 0%, rgba(53,196,255,.26), transparent 38%),
    radial-gradient(circle at 94% 2%, rgba(255,194,46,.24), transparent 36%),
    radial-gradient(circle at 50% 100%, rgba(139,92,246,.18), transparent 48%),
    linear-gradient(180deg,#F4F9FF 0%,#E8F0FF 100%);
  background-attachment:fixed;
}
/* 淡淡的点阵背景，呼应游戏里的彩豆 */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:radial-gradient(rgba(22,32,58,.07) 1.7px, transparent 1.8px);
  background-size:24px 24px;
  mask-image:linear-gradient(180deg,#000 0%,#000 55%,transparent 100%);
  -webkit-mask-image:linear-gradient(180deg,#000 0%,#000 55%,transparent 100%);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;cursor:pointer;}
h1,h2,h3,h4,p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
svg{width:1.15em;height:1.15em;flex:none;}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:6px;}

/* ===== 3. 布局 ===== */
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}
.section{padding:78px 0;position:relative;z-index:1;}
.pb-0{padding-bottom:0;}
.pt-0{padding-top:0;}
/* 锚点跳转时给吸顶导航留出高度，标题不会被导航挡住 */
#top,#features,#bonus,#faq,#about,#download{scroll-margin-top:92px;}

.section-head{max-width:640px;margin:0 auto 42px;text-align:center;}
.section-title{
  font-size:clamp(1.75rem,4vw,2.5rem);
  font-weight:900;letter-spacing:-.02em;line-height:1.25;margin:14px 0 12px;
}
.section-sub{color:var(--ink-2);font-size:1.02rem;}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;border-radius:999px;
  background:linear-gradient(135deg,rgba(255,255,255,.95),rgba(255,240,240,.9));
  border:1px solid rgba(255,75,75,.22);
  color:var(--red-deep);font-size:.86rem;font-weight:800;letter-spacing:.04em;
  box-shadow:0 8px 18px -12px rgba(255,75,75,.6);
}
.eyebrow .dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--grad-warm);
  box-shadow:0 0 0 4px rgba(255,75,75,.16);
}
.eyebrow-light{
  background:rgba(255,255,255,.16);
  border-color:rgba(255,255,255,.35);
  color:#FFE9C7;
  box-shadow:none;
}

/* ===== 4. 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  border:0;border-radius:999px;
  font-weight:900;letter-spacing:.02em;white-space:nowrap;
  padding:14px 30px;font-size:1rem;
  transition:transform .16s ease, box-shadow .16s ease, filter .16s ease;
}
.btn svg{width:1.2em;height:1.2em;stroke-width:2.4;}
.btn-sm{padding:10px 22px;font-size:.92rem;}
.btn-lg{padding:17px 38px;font-size:1.08rem;}

.btn-primary{
  background:var(--grad-warm);color:#fff;
  box-shadow:0 6px 0 var(--red-deep), 0 20px 34px -16px rgba(255,75,75,.75);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 0 var(--red-deep), 0 24px 38px -16px rgba(255,75,75,.8);}
.btn-primary:active{transform:translateY(4px);box-shadow:0 2px 0 var(--red-deep), 0 10px 18px -12px rgba(255,75,75,.7);}

.btn-ghost{
  background:#fff;color:var(--ink);
  box-shadow:0 6px 0 #D7E3F8, 0 18px 30px -22px rgba(22,32,58,.6);
}
.btn-ghost:hover{transform:translateY(-2px);color:var(--blue-deep);box-shadow:0 8px 0 #D7E3F8, 0 22px 34px -22px rgba(22,32,58,.65);}
.btn-ghost:active{transform:translateY(4px);box-shadow:0 2px 0 #D7E3F8;}

/* ===== 5. 顶部导航 ===== */
.header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,251,255,.82);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s ease, border-color .25s ease, background .25s ease;
}
.header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 14px 30px -26px rgba(22,32,58,.7);
  background:rgba(247,251,255,.94);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px;}
.logo{display:inline-flex;align-items:center;gap:11px;font-weight:900;font-size:1.14rem;letter-spacing:-.01em;}
.logo-img{
  width:42px;height:42px;border-radius:14px;overflow:hidden;flex:none;
  background:#fff;display:grid;place-items:center;
  box-shadow:0 8px 18px -10px rgba(22,32,58,.6);
}
.logo-img img{width:100%;height:100%;object-fit:cover;}
.nav-links{display:flex;align-items:center;gap:28px;font-size:.96rem;font-weight:700;color:var(--ink-2);}
.nav-links a{position:relative;padding:4px 0;transition:color .18s ease;}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:3px;border-radius:3px;
  background:var(--grad-warm);transform:scaleX(0);transform-origin:center;
  transition:transform .22s ease;
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-cta{display:flex;align-items:center;gap:12px;}

.nav-toggle{
  display:none;width:44px;height:44px;border:0;border-radius:14px;
  background:#fff;box-shadow:0 6px 16px -12px rgba(22,32,58,.8);
  position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2.4px;border-radius:2px;background:var(--ink);
  transform:translateX(-50%);transition:transform .2s ease, opacity .2s ease;
}
.nav-toggle span{top:50%;margin-top:-1.2px;}
.nav-toggle span::before{content:"";left:0;top:-6px;transform:none;}
.nav-toggle span::after{content:"";left:0;top:6px;transform:none;}

.mobile-menu{
  display:none;flex-direction:column;gap:4px;
  padding:16px 24px 24px;
  background:rgba(247,251,255,.98);
  border-bottom:1px solid var(--line);
  position:sticky;top:72px;z-index:55;
}
.mobile-menu.is-open{display:flex;}
.mobile-menu a{padding:12px 4px;font-weight:800;color:var(--ink-2);border-bottom:1px dashed var(--line);}
.mobile-menu .btn{margin-top:14px;}
/* ===== 6. 头图区 ===== */
.hero{padding:64px 0 76px;position:relative;z-index:1;overflow:hidden;}
.hero-grid{
  display:grid;grid-template-columns:minmax(0,1.16fr) minmax(0,1fr);
  gap:52px;align-items:center;
}
.hero-title{
  font-size:clamp(2.1rem,5.2vw,3.5rem);
  font-weight:900;line-height:1.16;letter-spacing:-.03em;
  margin:18px 0 16px;
}
.grad-text{
  background:var(--text-grad);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.hero-sub{color:var(--ink-2);font-size:1.06rem;max-width:34em;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 0;}
.hero-tags li{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px 8px 12px;border-radius:999px;
  background:#fff;border:1px solid var(--line);
  font-size:.9rem;font-weight:800;color:var(--ink-2);
  box-shadow:0 10px 20px -18px rgba(22,32,58,.9);
}
.hero-tags li::before{
  content:"";width:9px;height:9px;border-radius:50%;
  background:var(--grad-cool);
}
.hero-tags li:nth-child(2)::before{background:var(--grad-gold);}
.hero-tags li:nth-child(3)::before{background:var(--grad-warm);}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 0;}
.hero-note{margin-top:14px;font-size:.88rem;color:var(--ink-3);font-weight:600;}

/* 主视觉：游戏画面轮播卡片（彩色描边 + 柔和光晕） */
.hero-visual{position:relative;max-width:500px;margin-left:auto;}
/* 卡片背后的彩色光晕，让画面不孤单 */
.hero-visual::before{
  content:"";position:absolute;z-index:0;left:5%;right:5%;top:12%;bottom:20%;
  pointer-events:none;filter:blur(32px);opacity:.8;
  background:
    radial-gradient(circle at 28% 26%, rgba(255,138,61,.55), transparent 64%),
    radial-gradient(circle at 74% 76%, rgba(53,196,255,.5), transparent 64%),
    radial-gradient(circle at 50% 50%, rgba(139,92,246,.32), transparent 70%);
}
.showcase{
  position:relative;z-index:1;max-width:462px;margin:0 auto;
  padding:6px;border-radius:24px;
  background:linear-gradient(135deg,#FFC65C 0%,#FF6B6B 48%,#7B8BFF 100%);
  box-shadow:0 30px 56px -30px rgba(22,32,58,.55);
}
.showcase-screen{
  position:relative;border-radius:18px;overflow:hidden;background:#fff;
}
.slides{display:flex;transition:transform .6s cubic-bezier(.2,.8,.3,1);}
.slide{flex:0 0 100%;}
.slide img{width:100%;height:auto;display:block;}
.dots{display:flex;justify-content:center;gap:9px;margin-top:18px;}
.dots button{
  width:9px;height:9px;padding:0;border:0;border-radius:999px;
  background:rgba(22,32,58,.16);
  transition:width .28s ease, background .28s ease;
}
.dots button:hover{background:rgba(22,32,58,.3);}
.dots button.is-active{width:26px;background:var(--grad-warm);}
.dots-hint{margin-top:10px;text-align:center;font-size:.82rem;color:var(--ink-3);font-weight:600;}

.packet-float{
  position:absolute;right:-16px;top:-20px;z-index:4;
  display:flex;flex-direction:column;align-items:center;gap:4px;
  padding:12px 14px 10px;border-radius:22px;
  background:linear-gradient(160deg,#fff,#FFF4E8);
  box-shadow:0 22px 38px -20px rgba(255,75,75,.9);
  animation:bob 3s ease-in-out infinite;
}
.packet-float svg{width:42px;height:42px;}
.packet-float b{font-size:.8rem;color:var(--red-deep);letter-spacing:.08em;}

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

/* ===== 7. 玩法亮点条 ===== */
.stat-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:#fff;border-radius:var(--radius-lg);
  padding:8px;box-shadow:var(--shadow);
  border:1px solid var(--line);
}
.stat-item{
  padding:22px 18px;text-align:center;position:relative;
}
.stat-item+.stat-item::before{
  content:"";position:absolute;left:0;top:22%;bottom:22%;width:1px;
  background:var(--line);
}
.s-name{font-weight:900;font-size:1.06rem;margin-bottom:4px;color:var(--blue-deep);}
.stat-item:nth-child(2) .s-name{color:var(--red);}
.stat-item:nth-child(3) .s-name{color:var(--gold-deep);}
.stat-item:nth-child(4) .s-name{color:var(--purple);}
.s-desc{font-size:.88rem;color:var(--ink-3);font-weight:600;}

/* ===== 8. 玩法特色 ===== */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.card{
  background:#fff;border-radius:var(--radius-lg);padding:28px 24px;
  border:1px solid var(--line);
  box-shadow:var(--shadow-sm);
  transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.card:hover{
  transform:translateY(-6px);
  border-color:rgba(53,196,255,.45);
  box-shadow:0 34px 54px -34px rgba(22,32,58,.7);
}
.card-icon{
  width:58px;height:58px;border-radius:18px;
  display:grid;place-items:center;color:#fff;
  margin-bottom:18px;
  box-shadow:0 16px 26px -18px rgba(22,32,58,.9);
}
.card-icon svg{width:28px;height:28px;}
.tone-red{background:var(--grad-warm);}
.tone-blue{background:var(--grad-cool);}
.tone-gold{background:var(--grad-gold);}
.tone-purple{background:linear-gradient(135deg,#A78BFA 0%,#8B5CF6 50%,#6B3DE0 100%);}
.card-title{font-size:1.16rem;font-weight:900;letter-spacing:-.01em;margin-bottom:8px;}
.card-desc{color:var(--ink-2);font-size:.95rem;}
/* ===== 9. 红包奖励 ===== */
.bonus{
  position:relative;overflow:hidden;
  border-radius:var(--radius-xl);
  background:var(--grad-ink);
  padding:56px 54px;
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
  gap:44px;align-items:center;
  color:#fff;
  box-shadow:var(--shadow-lg);
}
.bonus::before,.bonus::after{
  content:"";position:absolute;border-radius:50%;pointer-events:none;
}
.bonus::before{
  width:420px;height:420px;right:-120px;top:-190px;
  background:radial-gradient(circle,rgba(255,75,75,.55),transparent 66%);
}
.bonus::after{
  width:380px;height:380px;left:-140px;bottom:-200px;
  background:radial-gradient(circle,rgba(53,196,255,.42),transparent 66%);
}
.bonus-copy{position:relative;z-index:1;}
.bonus-title{font-size:clamp(1.6rem,3.4vw,2.2rem);font-weight:900;line-height:1.26;letter-spacing:-.02em;margin:16px 0 14px;}
.bonus-sub{color:rgba(255,255,255,.78);font-size:1rem;}
.bonus-list{position:relative;z-index:1;display:grid;gap:14px;}
.bonus-list li{
  display:flex;align-items:flex-start;gap:16px;
  padding:18px 20px;border-radius:20px;
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.16);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  transition:background .2s ease, transform .2s ease;
}
.bonus-list li:hover{background:rgba(255,255,255,.16);transform:translateX(4px);}
.b-icon{
  width:44px;height:44px;border-radius:14px;flex:none;
  display:grid;place-items:center;color:#3B2A00;
  background:var(--grad-gold);
  box-shadow:0 14px 24px -16px rgba(255,194,46,.95);
}
.b-icon svg{width:22px;height:22px;}
.bonus-list b{display:block;font-size:1.02rem;font-weight:900;}
.bonus-list small{display:block;color:rgba(255,255,255,.72);font-size:.88rem;line-height:1.6;}
.bonus-note{
  position:relative;z-index:1;grid-column:1/-1;
  margin-top:2px;font-size:.82rem;color:rgba(255,255,255,.6);
  border-top:1px dashed rgba(255,255,255,.18);padding-top:16px;
}

/* ===== 10. 常见问题 ===== */
.faq{
  max-width:860px;margin:0 auto;
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:8px 26px;
  box-shadow:var(--shadow-sm);
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:0;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:none;border:0;text-align:left;
  padding:24px 0;font-size:1.04rem;font-weight:800;letter-spacing:-.01em;
  transition:color .18s ease;
}
.faq-q:hover{color:var(--red);}
.faq-q .icon{
  width:30px;height:30px;border-radius:50%;flex:none;position:relative;
  background:var(--surface-2);border:1px solid var(--line);
  transition:background .22s ease, transform .22s ease, border-color .22s ease;
}
.faq-q .icon::before,.faq-q .icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink-2);
  border-radius:2px;transform:translate(-50%,-50%);
  transition:background .22s ease, transform .22s ease;
}
.faq-q .icon::before{width:12px;height:2.2px;}
.faq-q .icon::after{width:2.2px;height:12px;}
.faq-item.is-open .faq-q{color:var(--red);}
.faq-item.is-open .icon{background:var(--grad-warm);border-color:transparent;transform:rotate(180deg);}
.faq-item.is-open .icon::before,.faq-item.is-open .icon::after{background:#fff;}
.faq-item.is-open .icon::after{transform:translate(-50%,-50%) scaleY(0);}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease;}
.faq-item.is-open .faq-a{grid-template-rows:1fr;}
.faq-a-inner{overflow:hidden;}
.faq-a-inner p{color:var(--ink-2);font-size:.95rem;padding-bottom:26px;}

/* ===== 11. 关于 ===== */
.about{
  max-width:940px;margin:0 auto;text-align:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:48px 46px;box-shadow:var(--shadow-sm);
}
.about h2{font-size:clamp(1.5rem,3vw,2rem);font-weight:900;letter-spacing:-.02em;margin-bottom:22px;}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;text-align:left;}
.about-grid p{color:var(--ink-2);font-size:.97rem;}

/* ===== 12. 下载入口 ===== */
.cta-band{
  position:relative;overflow:hidden;text-align:center;
  border-radius:var(--radius-xl);padding:62px 40px;
  background:var(--grad-warm);
  color:#fff;box-shadow:0 44px 74px -46px rgba(255,75,75,1);
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.28) 2px, transparent 2.2px);
  background-size:26px 26px;opacity:.5;
}
.cta-band h2{position:relative;z-index:1;font-size:clamp(1.6rem,3.6vw,2.3rem);font-weight:900;letter-spacing:-.02em;}
.cta-band p{position:relative;z-index:1;margin-top:12px;color:rgba(255,255,255,.9);}
.cta-actions{position:relative;z-index:1;display:flex;justify-content:center;margin-top:28px;}
.cta-band .btn-primary{
  background:#fff;color:var(--red-deep);
  box-shadow:0 6px 0 rgba(0,0,0,.22), 0 22px 40px -18px rgba(0,0,0,.5);
}
.cta-band .btn-primary:hover{box-shadow:0 8px 0 rgba(0,0,0,.22), 0 26px 44px -18px rgba(0,0,0,.55);}
.cta-band .btn-primary:active{box-shadow:0 2px 0 rgba(0,0,0,.22);}
.cta-note{position:relative;z-index:1;font-size:.86rem;color:rgba(255,255,255,.85);margin-top:18px;font-weight:600;}

/* ===== 13. 底部 ===== */
.footer{
  margin-top:40px;position:relative;z-index:1;
  background:rgba(255,255,255,.72);
  border-top:1px solid var(--line);
  padding:52px 0 30px;
}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:40px;}
.footer-brand p{margin-top:16px;color:var(--ink-3);font-size:.9rem;max-width:34em;}
.footer-nav h3{font-size:.95rem;font-weight:900;margin-bottom:14px;}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:.92rem;}
.footer-links.cols-2{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px;}
.footer-links a{color:var(--ink-2);font-weight:600;transition:color .18s ease;}
.footer-links a:hover{color:var(--red);}
.footer-bottom{
  margin-top:38px;padding-top:22px;border-top:1px dashed var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:.84rem;color:var(--ink-3);
}
.footer-bottom a:hover{color:var(--red);}

/* ===== 14. 下载弹窗 ===== */
.modal{
  position:fixed;inset:0;z-index:100;
  display:grid;place-items:center;padding:24px;
  opacity:0;visibility:hidden;transition:opacity .24s ease, visibility .24s ease;
}
.modal.is-open{opacity:1;visibility:visible;}
.modal-overlay{position:absolute;inset:0;background:rgba(16,26,51,.55);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);}
.modal-box{
  position:relative;z-index:1;width:100%;max-width:460px;
  background:#fff;border-radius:var(--radius-lg);padding:34px 30px 26px;
  box-shadow:0 50px 90px -40px rgba(16,26,51,.9);
  transform:translateY(14px) scale(.97);transition:transform .26s cubic-bezier(.2,.9,.3,1.2);
}
.modal.is-open .modal-box{transform:none;}
.modal-close{
  position:absolute;right:14px;top:14px;
  width:38px;height:38px;border-radius:50%;border:0;
  background:var(--surface-2);color:var(--ink-2);
  font-size:1.3rem;line-height:1;font-weight:700;
  transition:background .18s ease, color .18s ease, transform .18s ease;
}
.modal-close:hover{background:#FFECEC;color:var(--red);transform:rotate(90deg);}
.modal-box h3{font-size:1.3rem;font-weight:900;letter-spacing:-.01em;}
.modal-sub{color:var(--ink-3);font-size:.9rem;margin-top:6px;}
.platform-list{display:grid;gap:12px;margin-top:22px;}
.platform{
  display:flex;align-items:center;gap:14px;
  padding:14px 18px;border-radius:18px;
  background:var(--surface-2);border:1px solid var(--line);
  transition:transform .18s ease, border-color .18s ease, box-shadow .18s ease, background .18s ease;
}
.platform:hover{
  transform:translateY(-3px);background:#fff;
  border-color:rgba(255,75,75,.45);
  box-shadow:0 22px 34px -26px rgba(22,32,58,.9);
}
.p-icon{
  width:44px;height:44px;border-radius:14px;flex:none;
  display:grid;place-items:center;color:#fff;background:var(--grad-cool);
}
.p-icon svg{width:22px;height:22px;}
.platform:nth-child(1) .p-icon{background:var(--grad-warm);}
.platform:nth-child(2) .p-icon{background:var(--grad-gold);color:#4A3300;}
.platform b{display:block;font-size:.98rem;font-weight:900;}
.platform small{display:block;color:var(--ink-3);font-size:.83rem;}
.p-arrow{margin-left:auto;color:var(--ink-3);font-weight:900;transition:transform .18s ease, color .18s ease;}
.platform:hover .p-arrow{color:var(--red);transform:translateX(4px);}
.modal-foot{margin-top:18px;text-align:center;font-size:.8rem;color:var(--ink-3);}

/* ===== 15. 滚动进场 ===== */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease, transform .6s cubic-bezier(.2,.8,.3,1);}
.reveal.is-visible{opacity:1;transform:none;}

/* ===== 16. 响应式 ===== */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:48px;}
  .hero-sub{max-width:none;}
  .hero-visual{max-width:560px;margin:0 auto;}
  .nav-links{gap:20px;}
  .features{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:900px){
  .nav-links{display:none;}
  .nav-toggle{display:block;}
  .section{padding:62px 0;}
  .stat-bar{grid-template-columns:1fr 1fr;}
  .stat-item:nth-child(3)::before,.stat-item:nth-child(odd)::before{display:none;}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line);}
  .bonus{grid-template-columns:1fr;padding:44px 30px;gap:30px;}
  .about{padding:38px 26px;}
  .about-grid{grid-template-columns:1fr;gap:16px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
}
@media (max-width:640px){
  .wrap{padding:0 18px;}
  .features{grid-template-columns:1fr;}
  .hero{padding:40px 0 60px;}
  .hero-title{font-size:clamp(1.9rem,8vw,2.5rem);}
  .hero-actions .btn{flex:1 1 auto;justify-content:center;}
  .logo{font-size:1.02rem;}
  .logo-img{width:38px;height:38px;border-radius:12px;}
  .faq{padding:4px 18px;}
  .faq-q{padding:20px 0;font-size:.98rem;}
  .cta-band{padding:46px 22px;border-radius:var(--radius-lg);}
  .cta-band .btn{width:100%;}
  .modal-box{padding:28px 20px 22px;}
  .packet-float{right:-6px;top:-18px;padding:10px;}
  .packet-float svg{width:34px;height:34px;}
  .stat-item{padding:18px 12px;}
  .s-name{font-size:.98rem;}
  .s-desc{font-size:.8rem;}
}

/* ===== 17. 动效降级 ===== */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .packet-float{animation:none;}
  .reveal{opacity:1;transform:none;transition:none;}
  .slides{transition:none;}
}