/* ========== 基础重置与设计变量 ========== */
:root{
  --bg:#0A0E1A;
  --bg-2:#0D1424;
  --bg-3:#111A30;
  --line:rgba(124,141,181,.14);
  --line-strong:rgba(0,229,160,.45);
  --primary:#00E5A0;
  --primary-deep:#00B87D;
  --amber:#FFB547;
  --text:#E8EEF9;
  --text-2:#A9B7D6;
  --text-3:#7C8DB5;
  --danger:#FF6B6B;
  --radius:18px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --font-serif:"Noto Serif SC","Source Han Serif SC","STZhongsong","SimSun",serif;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",sans-serif;
  --font-tech:"Chakra Petch","DIN Alternate","Bahnschrift",monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background:rgba(0,229,160,.3);color:#fff}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font-family:inherit}

/* 滚动条 */
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:#1d2a45;border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:var(--primary-deep)}

/* ========== 背景纹理层 ========== */
.bg-fx{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg-fx .grid-line{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(124,141,181,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(124,141,181,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 75%);
}
.bg-fx .glow-1{
  position:absolute;top:-220px;left:50%;transform:translateX(-50%);
  width:900px;height:520px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(0,229,160,.12),transparent);
  filter:blur(30px);
}
.bg-fx .glow-2{
  position:absolute;bottom:-260px;right:-160px;
  width:720px;height:720px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(0,120,255,.10),transparent);
  filter:blur(40px);
}
.bg-fx .noise{
  position:absolute;inset:0;opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
}

/* ========== 通用容器与区块 ========== */
.container{position:relative;z-index:1;max-width:1200px;margin:0 auto;padding:0 24px}
section{position:relative;z-index:1}
.sec-pad{padding:110px 0}
.sec-head{max-width:760px;margin:0 auto 64px;text-align:center}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-tech);font-size:13px;letter-spacing:4px;color:var(--primary);
  padding:8px 18px;border:1px solid var(--line-strong);border-radius:999px;
  background:rgba(0,229,160,.06);margin-bottom:22px;text-transform:uppercase;
}
.sec-eyebrow::before{content:"";width:6px;height:6px;background:var(--primary);border-radius:50%;box-shadow:0 0 10px var(--primary)}
.sec-title{
  font-family:var(--font-serif);font-weight:700;font-size:clamp(30px,4vw,46px);
  line-height:1.3;letter-spacing:1px;
}
.sec-title .grad{background:linear-gradient(120deg,var(--primary),#4DFFE0 55%,var(--amber));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.sec-sub{color:var(--text-2);font-size:16px;margin-top:18px}

/* ========== 顶部导航 ========== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:all .35s ease;padding:18px 0;
}
.nav.scrolled{
  background:rgba(10,14,26,.82);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);padding:10px 0;
}
.nav .container{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px}
.logo .mark{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  box-shadow:0 0 22px rgba(0,229,160,.4);flex-shrink:0;
}
.logo .mark svg{width:22px;height:22px;color:#04120C}
.logo b{font-family:var(--font-serif);font-size:20px;letter-spacing:1px}
.logo span{display:block;font-size:11px;color:var(--text-3);letter-spacing:2px;margin-top:-2px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  padding:8px 14px;font-size:14.5px;color:var(--text-2);border-radius:8px;transition:all .25s;position:relative;
}
.nav-links a:hover{color:var(--primary);background:rgba(0,229,160,.07)}
.nav-links a.nav-cta{
  margin-left:14px;padding:10px 22px;font-size:14px;font-weight:600;color:#04120C;
  background:linear-gradient(120deg,var(--primary),var(--primary-deep));
  border-radius:10px;box-shadow:0 6px 24px rgba(0,229,160,.35);
  transition:all .25s;white-space:nowrap;
}
.nav-links a.nav-cta:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(0,229,160,.5);background:linear-gradient(120deg,var(--primary-deep),var(--primary-deep))}
.burger{display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);place-items:center}
.burger span{display:block;width:18px;height:2px;background:var(--text);margin:2.5px auto;transition:all .3s;border-radius:2px}
.burger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.active span:nth-child(2){opacity:0}
.burger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ========== Hero ========== */
.hero{
  min-height:100vh;display:flex;align-items:center;
  padding:140px 0 80px;position:relative;overflow:hidden;
}
#webgl{position:absolute;inset:0;width:100%;height:100%;z-index:0;opacity:.85}
.hero .container{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;padding:9px 20px;
  border:1px solid var(--line-strong);border-radius:999px;background:rgba(0,229,160,.07);
  font-size:13px;color:var(--primary);margin-bottom:26px;
}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--primary);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(0,229,160,.5)}50%{box-shadow:0 0 0 8px rgba(0,229,160,0)}}
.hero h1{
  font-family:var(--font-serif);font-weight:800;
  font-size:clamp(38px,5.2vw,60px);line-height:1.22;letter-spacing:2px;
}
.hero h1 .grad{background:linear-gradient(120deg,#4DFFE0,var(--primary) 45%,var(--amber));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .type-wrap{height:40px;margin-top:22px;font-size:clamp(17px,1.8vw,21px);color:var(--text-2);font-weight:500}
.hero .type-wrap .cursor{display:inline-block;width:2px;height:1.15em;background:var(--primary);margin-left:3px;vertical-align:-3px;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.hero-feats{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 38px}
.hero-feats li{
  display:flex;align-items:center;gap:8px;padding:9px 16px;
  border:1px solid var(--line);border-radius:10px;background:rgba(17,26,48,.6);
  font-size:14px;color:var(--text-2);
}
.hero-feats li svg{width:16px;height:16px;color:var(--primary);flex-shrink:0}
.hero-btns{display:flex;gap:18px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:10px;padding:15px 34px;
  border-radius:12px;font-size:16px;font-weight:700;transition:all .3s;position:relative;overflow:hidden;
}
.btn-primary{
  background:linear-gradient(120deg,var(--primary),var(--primary-deep));color:#04120C;
  box-shadow:0 8px 30px rgba(0,229,160,.4);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 40px rgba(0,229,160,.55)}
.btn-primary::after{
  content:"";position:absolute;top:0;left:-80%;width:50%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.45),transparent);
  transform:skewX(-20deg);transition:left .6s;
}
.btn-primary:hover::after{left:130%}
.btn-ghost{
  border:1px solid var(--line-strong);color:var(--primary);background:rgba(0,229,160,.05);
}
.btn-ghost:hover{background:rgba(0,229,160,.14);transform:translateY(-3px)}
.hero-stats{display:flex;gap:44px;margin-top:52px;padding-top:30px;border-top:1px solid var(--line)}
.hero-stats .num{font-family:var(--font-tech);font-size:30px;font-weight:700;color:#fff;line-height:1.1}
.hero-stats .num em{color:var(--primary);font-style:normal}
.hero-stats .lbl{font-size:13px;color:var(--text-3);margin-top:4px}

/* Hero 右侧视觉 */
.hero-visual{position:relative;display:grid;place-items:center}
.spider-web{width:min(430px,100%);aspect-ratio:1;position:relative;animation:floatY 6s ease-in-out infinite}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-18px)}}
.spider-web svg{width:100%;height:100%}
.spider-web .ring-card{
  position:absolute;background:rgba(13,20,36,.85);border:1px solid var(--line);border-radius:14px;
  padding:14px 18px;backdrop-filter:blur(10px);box-shadow:var(--shadow);
  animation:floatY 5s ease-in-out infinite;
}
.spider-web .rc-1{top:6%;left:-8%;animation-delay:.4s}
.spider-web .rc-2{bottom:10%;right:-6%;animation-delay:1s}
.spider-web .rc-3{bottom:-4%;left:6%;animation-delay:1.6s}
.ring-card .tag{font-size:11px;color:var(--text-3);letter-spacing:1px}
.ring-card .val{font-family:var(--font-tech);font-size:22px;font-weight:700;color:var(--primary)}
.ring-card .up{color:var(--amber);font-size:12px;font-weight:600}
.scroll-hint{
  position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--text-3);font-size:12px;letter-spacing:3px;z-index:2;
}
.scroll-hint .line{width:1px;height:44px;background:linear-gradient(var(--primary),transparent);animation:drop 1.8s infinite}
@keyframes drop{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ========== 痛点 ========== */
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.pain-card{
  position:relative;padding:38px 30px;border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(17,26,48,.7),rgba(13,20,36,.5));
  border:1px solid var(--line);transition:all .35s;overflow:hidden;
}
.pain-card::before{
  content:"";position:absolute;inset:0;background:linear-gradient(160deg,rgba(255,107,107,.06),transparent 55%);
  opacity:0;transition:opacity .35s;
}
.pain-card:hover{transform:translateY(-8px);border-color:rgba(255,107,107,.4);box-shadow:var(--shadow)}
.pain-card:hover::before{opacity:1}
.pain-icon{
  width:56px;height:56px;border-radius:14px;display:grid;place-items:center;margin-bottom:22px;
  background:rgba(255,107,107,.1);border:1px solid rgba(255,107,107,.3);color:var(--danger);
}
.pain-icon svg{width:26px;height:26px}
.pain-card h3{font-family:var(--font-serif);font-size:20px;margin-bottom:12px}
.pain-card p{font-size:14px;color:var(--text-2)}
.pain-idx{
  position:absolute;top:22px;right:24px;font-family:var(--font-tech);font-size:34px;font-weight:700;
  color:rgba(255,255,255,.05);
}

/* ========== 原理 ========== */
.about{background:linear-gradient(180deg,transparent,rgba(0,229,160,.02) 30%,transparent)}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.about-copy h2{font-family:var(--font-serif);font-size:clamp(28px,3.4vw,40px);line-height:1.35;margin-bottom:26px}
.about-copy h2 .grad{background:linear-gradient(120deg,var(--primary),#4DFFE0);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.about-copy p{color:var(--text-2);font-size:15.5px;margin-bottom:20px}
.about-points li{display:flex;gap:14px;margin-bottom:18px;align-items:flex-start}
.about-points .chk{
  width:26px;height:26px;border-radius:50%;flex-shrink:0;display:grid;place-items:center;margin-top:2px;
  background:rgba(0,229,160,.12);border:1px solid var(--line-strong);color:var(--primary);
}
.about-points .chk svg{width:14px;height:14px}
.about-points h4{font-size:16px;margin-bottom:3px}
.about-points p{font-size:13.5px;color:var(--text-3);margin:0}

/* 步骤 */
.steps{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:20px}
.steps::before{
  content:"";position:absolute;top:44px;left:8%;right:8%;height:2px;
  background:linear-gradient(90deg,transparent,var(--line-strong),var(--line-strong),transparent);
  opacity:.5;
}
.step-card{
  position:relative;text-align:center;padding:34px 20px;border-radius:var(--radius);
  background:rgba(17,26,48,.6);border:1px solid var(--line);transition:all .35s;
}
.step-card:hover{transform:translateY(-6px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.step-num{
  width:88px;height:88px;margin:0 auto 22px;border-radius:50%;display:grid;place-items:center;position:relative;
  background:radial-gradient(circle at 30% 25%,rgba(0,229,160,.25),rgba(13,20,36,1) 70%);
  border:1px solid var(--line-strong);
}
.step-num svg{width:38px;height:38px;color:var(--primary)}
.step-num .idx{
  position:absolute;top:-4px;right:-4px;width:26px;height:26px;border-radius:50%;
  background:var(--primary);color:#04120C;font-family:var(--font-tech);font-size:13px;font-weight:700;
  display:grid;place-items:center;
}
.step-card h3{font-family:var(--font-serif);font-size:19px;margin-bottom:10px}
.step-card p{font-size:13.5px;color:var(--text-2)}

/* ========== 优势 ========== */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.adv-card{
  position:relative;padding:40px 32px;border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(17,26,48,.75),rgba(13,20,36,.55));
  border:1px solid var(--line);transition:all .4s;overflow:hidden;
}
.adv-card::after{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--primary),transparent);
  transform:scaleX(0);transform-origin:left;transition:transform .45s;
}
.adv-card:hover{transform:translateY(-10px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.adv-card:hover::after{transform:scaleX(1)}
.adv-corner{
  position:absolute;top:26px;right:26px;width:10px;height:10px;border-top:2px solid var(--primary);border-right:2px solid var(--primary);opacity:.5;
}
.adv-icon{
  width:62px;height:62px;border-radius:16px;display:grid;place-items:center;margin-bottom:24px;
  background:linear-gradient(135deg,rgba(0,229,160,.16),rgba(0,229,160,.03));
  border:1px solid var(--line-strong);color:var(--primary);
  box-shadow:inset 0 0 20px rgba(0,229,160,.08);
}
.adv-icon svg{width:30px;height:30px}
.adv-card h3{font-family:var(--font-serif);font-size:21px;margin-bottom:12px}
.adv-card p{font-size:14px;color:var(--text-2)}
.adv-tag{
  display:inline-block;margin-top:16px;font-family:var(--font-tech);font-size:12px;letter-spacing:1px;
  color:var(--amber);border:1px solid rgba(255,181,71,.35);padding:4px 12px;border-radius:6px;
  background:rgba(255,181,71,.07);
}

/* ========== 数据看板 ========== */
.data-sec{position:relative;overflow:hidden}
.data-sec::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse 70% 60% at 50% 50%,rgba(0,229,160,.06),transparent 70%);
}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.data-card{
  text-align:center;padding:44px 24px;border-radius:var(--radius);
  background:rgba(13,20,36,.7);border:1px solid var(--line);transition:all .35s;position:relative;
}
.data-card:hover{transform:translateY(-6px);border-color:var(--line-strong)}
.data-card .val{font-family:var(--font-tech);font-size:clamp(34px,3.4vw,46px);font-weight:700;color:#fff;line-height:1.2}
.data-card .val em{color:var(--primary);font-style:normal}
.data-card .lbl{color:var(--text-2);font-size:14px;margin-top:8px}
.data-card .bar{
  position:absolute;bottom:0;left:20%;right:20%;height:3px;border-radius:3px;background:rgba(255,255,255,.06);overflow:hidden;
}
.data-card .bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--primary),#4DFFE0);transition:width 1.4s cubic-bezier(.25,.8,.25,1)}

/* ========== 案例 ========== */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.case-card{
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  background:rgba(13,20,36,.7);transition:all .4s;
}
.case-card:hover{transform:translateY(-8px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.case-top{display:flex;align-items:center;justify-content:space-between;padding:22px 26px;border-bottom:1px solid var(--line)}
.case-site{display:flex;align-items:center;gap:12px}
.case-fav{
  width:44px;height:44px;border-radius:12px;flex-shrink:0;object-fit:contain;
  background:#fff;border:1px solid rgba(124,141,181,.2);
  box-shadow:0 4px 14px rgba(0,0,0,.25);
}
.case-site h4{font-size:16px}
.case-site span{font-size:12px;color:var(--text-3)}
.case-type{font-family:var(--font-tech);font-size:12px;padding:5px 12px;border-radius:6px;border:1px solid var(--line);color:var(--text-2);background:rgba(255,255,255,.03)}
.case-body{padding:26px}
.case-row{display:flex;justify-content:space-between;align-items:center;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px}
.case-row:last-child{border-bottom:none}
.case-row .k{color:var(--text-3)}
.case-row .v{font-family:var(--font-tech);font-weight:600}
.case-row .v.grow{color:var(--primary)}
.case-progress{height:6px;border-radius:6px;background:rgba(255,255,255,.07);margin:18px 0 6px;overflow:hidden}
.case-progress i{display:block;height:100%;width:0;border-radius:6px;background:linear-gradient(90deg,var(--primary),#4DFFE0);transition:width 1.4s .2s cubic-bezier(.25,.8,.25,1)}
.case-progress-lbl{display:flex;justify-content:space-between;font-size:12px;color:var(--text-3);font-family:var(--font-tech)}

/* ========== 套餐 ========== */
.plans-sec{background:linear-gradient(180deg,transparent,rgba(0,229,160,.025) 40%,transparent)}
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;align-items:stretch}
.plan-card{
  position:relative;display:flex;flex-direction:column;padding:44px 34px;border-radius:22px;
  background:rgba(13,20,36,.72);border:1px solid var(--line);transition:all .4s;
}
.plan-card:hover{transform:translateY(-8px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.plan-card.hot{
  background:linear-gradient(180deg,rgba(0,229,160,.08),rgba(13,20,36,.85));
  border-color:var(--line-strong);box-shadow:0 0 60px rgba(0,229,160,.12);
  transform:scale(1.04);z-index:2;
}
.plan-card.hot:hover{transform:scale(1.04) translateY(-8px)}
.plan-badge{
  position:absolute;top:-14px;left:50%;transform:translateX(-50%);
  background:linear-gradient(120deg,var(--amber),#FF9A3C);color:#241200;font-size:12px;font-weight:700;
  padding:6px 18px;border-radius:999px;letter-spacing:1px;white-space:nowrap;
  box-shadow:0 6px 20px rgba(255,181,71,.4);
}
.plan-name{font-family:var(--font-tech);font-size:15px;letter-spacing:3px;color:var(--primary)}
.plan-card.hot .plan-name{color:var(--amber)}
.plan-desc{font-size:13.5px;color:var(--text-3);margin:8px 0 22px}
.plan-ask{
  display:inline-flex;align-items:center;gap:10px;margin-bottom:28px;
  padding:13px 20px;border-radius:12px;
  border:1px solid var(--line-strong);background:rgba(0,229,160,.06);
  color:var(--primary);font-size:15px;font-weight:600;letter-spacing:1px;
}
.plan-ask svg{width:18px;height:18px;flex-shrink:0}
.plan-feats{flex:1;margin-bottom:30px}
.plan-feats li{display:flex;gap:10px;align-items:flex-start;padding:9px 0;font-size:14px;color:var(--text-2)}
.plan-feats li svg{width:16px;height:16px;color:var(--primary);flex-shrink:0;margin-top:4px}
.plan-feats li.no{opacity:.4}
.plan-feats li.no svg{color:var(--text-3)}
.plan-btn{
  display:block;text-align:center;padding:14px;border-radius:12px;font-size:15px;font-weight:700;
  border:1px solid var(--line-strong);color:var(--primary);background:rgba(0,229,160,.06);transition:all .3s;
}
.plan-btn:hover{background:rgba(0,229,160,.16)}
.plan-card.hot .plan-btn{background:linear-gradient(120deg,var(--primary),var(--primary-deep));color:#04120C;box-shadow:0 8px 26px rgba(0,229,160,.4)}
.plan-card.hot .plan-btn:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(0,229,160,.55)}
.plan-note{text-align:center;color:var(--text-3);font-size:13px;margin-top:30px}

/* ========== 教学 ========== */
.course-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center}
.course-modules .mod{
  display:flex;gap:20px;padding:22px 0;border-bottom:1px dashed var(--line);align-items:flex-start;
}
.course-modules .mod:last-child{border-bottom:none}
.mod-idx{
  font-family:var(--font-tech);font-size:26px;font-weight:700;color:var(--primary);
  width:52px;height:52px;flex-shrink:0;border-radius:12px;display:grid;place-items:center;
  border:1px solid var(--line-strong);background:rgba(0,229,160,.06);
}
.mod h4{font-size:17px;margin-bottom:5px}
.mod p{font-size:13.5px;color:var(--text-2)}
.course-side .course-card{
  padding:36px;border-radius:22px;background:linear-gradient(180deg,rgba(0,229,160,.08),rgba(13,20,36,.8));
  border:1px solid var(--line-strong);
}
.course-side h3{font-family:var(--font-serif);font-size:24px;margin-bottom:8px}
.course-side > p{color:var(--text-2);font-size:14px;margin-bottom:24px}
.course-side ul li{display:flex;gap:12px;padding:11px 0;font-size:14.5px;color:var(--text-2);align-items:center}
.course-side ul li svg{width:18px;height:18px;color:var(--primary);flex-shrink:0}
.course-cta{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap}

/* ========== FAQ ========== */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{
  border:1px solid var(--line);border-radius:16px;margin-bottom:16px;overflow:hidden;
  background:rgba(13,20,36,.6);transition:all .3s;
}
.faq-item.open{border-color:var(--line-strong);background:rgba(17,26,48,.8)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:18px;padding:22px 26px;text-align:left;
  font-size:16px;font-weight:600;transition:all .25s;
}
.faq-q:hover{color:var(--primary)}
.faq-q .idx{font-family:var(--font-tech);color:var(--primary);font-size:13px;letter-spacing:1px}
.faq-q .icon{
  margin-left:auto;width:32px;height:32px;flex-shrink:0;border-radius:50%;
  border:1px solid var(--line-strong);display:grid;place-items:center;transition:all .35s;color:var(--primary);
}
.faq-item.open .icon{transform:rotate(45deg);background:var(--primary);color:#04120C}
.faq-a{max-height:0;overflow:hidden;transition:max-height .45s cubic-bezier(.25,.8,.25,1)}
.faq-a p{padding:0 26px 24px 60px;color:var(--text-2);font-size:14.5px}

/* ========== 联系 / 转化 ========== */
.contact-sec{position:relative}
.contact-sec::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse 80% 70% at 50% 100%,rgba(0,229,160,.07),transparent 70%);
}
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;max-width:1000px;margin:0 auto}
.channel-card{
  position:relative;display:block;text-align:center;padding:46px 30px;border-radius:22px;
  background:rgba(13,20,36,.72);border:1px solid var(--line);transition:all .4s;overflow:hidden;
}
.channel-card::after{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--primary),transparent);
  transform:scaleX(0);transform-origin:left;transition:transform .45s;
}
.channel-card:hover{transform:translateY(-8px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.channel-card:hover::after{transform:scaleX(1)}
.channel-card.hot{
  background:linear-gradient(180deg,rgba(0,229,160,.08),rgba(13,20,36,.85));
  border-color:var(--line-strong);box-shadow:0 0 50px rgba(0,229,160,.12);
}
.channel-ic{
  width:70px;height:70px;border-radius:20px;margin:0 auto 22px;display:grid;place-items:center;
}
.channel-ic svg{width:34px;height:34px}
.channel-ic.wechat{background:linear-gradient(135deg,rgba(0,229,160,.2),rgba(0,229,160,.05));border:1px solid var(--line-strong);color:var(--primary)}
.channel-ic.qq{background:linear-gradient(135deg,rgba(255,181,71,.18),rgba(255,181,71,.05));border:1px solid rgba(255,181,71,.45);color:var(--amber)}
.channel-ic.tg{background:linear-gradient(135deg,rgba(91,140,255,.18),rgba(91,140,255,.05));border:1px solid rgba(91,140,255,.45);color:#5B8CFF}
.channel-label{display:block;font-size:13px;letter-spacing:3px;color:var(--text-3);margin-bottom:8px;font-family:var(--font-tech)}
.channel-val{display:block;font-family:var(--font-tech);font-size:26px;font-weight:700;color:#fff;letter-spacing:1px;margin-bottom:24px;word-break:break-all}
.channel-btn{
  display:inline-flex;align-items:center;gap:8px;padding:11px 26px;border-radius:10px;
  border:1px solid var(--line-strong);color:var(--primary);font-size:14px;font-weight:600;
  background:rgba(0,229,160,.07);transition:all .3s;
}
.channel-btn svg{width:15px;height:15px}
.channel-card:hover .channel-btn{background:rgba(0,229,160,.18)}
.channel-btn.copied{background:var(--primary);color:#04120C}
@media (max-width:768px){
  .channel-grid{grid-template-columns:1fr}
  .channel-val{font-size:22px}
}

/* ========== 页脚 ========== */
footer{border-top:1px solid var(--line);padding:56px 0 30px;margin-top:60px;background:rgba(8,11,20,.6)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:44px;margin-bottom:44px}
.foot-brand p{color:var(--text-3);font-size:13.5px;margin-top:16px;max-width:340px}
.foot-col h4{font-family:var(--font-tech);font-size:13px;letter-spacing:3px;color:var(--primary);margin-bottom:20px}
.foot-col a{display:block;padding:7px 0;font-size:14px;color:var(--text-2);transition:all .25s}
.foot-col a:hover{color:var(--primary);padding-left:6px}
.foot-bottom{
  border-top:1px solid var(--line);padding-top:26px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-size:13px;color:var(--text-3);
}
.foot-bottom a:hover{color:var(--primary)}

/* 回到顶部 */
.to-top{
  position:fixed;right:26px;bottom:30px;z-index:90;width:48px;height:48px;border-radius:12px;
  background:rgba(13,20,36,.9);border:1px solid var(--line-strong);color:var(--primary);
  display:grid;place-items:center;opacity:0;pointer-events:none;transform:translateY(14px);transition:all .35s;
}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{background:var(--primary);color:#04120C}
.to-top svg{width:20px;height:20px}

/* 滚动渐显 */
.reveal{opacity:0;transform:translateY(36px);transition:opacity .8s ease,transform .8s cubic-bezier(.25,.8,.25,1)}
.reveal.in{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.1s}
.reveal[data-delay="2"]{transition-delay:.2s}
.reveal[data-delay="3"]{transition-delay:.3s}
.reveal[data-delay="4"]{transition-delay:.4s}

/* ========== 响应式 ========== */
@media (max-width:1024px){
  .hero .container{grid-template-columns:1fr;gap:40px;text-align:center}
  .hero-feats,.hero-btns{justify-content:center}
  .hero-stats{justify-content:center}
  .hero-visual{order:-1;transform:scale(.85);margin-top:-20px}
  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr;gap:44px}
  .steps{grid-template-columns:repeat(2,1fr);gap:18px}
  .steps::before{display:none}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .plan-grid{grid-template-columns:repeat(2,1fr)}
  .plan-card.hot{transform:none}
  .plan-card.hot:hover{transform:translateY(-8px)}
  .course-grid{grid-template-columns:1fr;gap:44px}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .sec-pad{padding:76px 0}
  .nav-links{
    position:fixed;top:0;right:-100%;height:100vh;width:min(320px,82%);flex-direction:column;
    justify-content:center;gap:8px;background:rgba(10,14,26,.97);backdrop-filter:blur(20px);
    border-left:1px solid var(--line);transition:right .4s cubic-bezier(.25,.8,.25,1);z-index:98;
  }
  .nav-links.open{right:0}
  .nav-links a{font-size:17px;padding:12px 24px}
  .nav-links a.nav-cta{margin:14px 0 0}
  .burger{display:grid}
  .hero{padding-top:120px}
  .hero-stats{gap:24px;flex-wrap:wrap}
  .hero-stats .num{font-size:24px}
  .pain-grid,.adv-grid,.data-grid,.case-grid,.plan-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .spider-web .rc-1{left:0}
  .spider-web .rc-2{right:0}
  .faq-a p{padding-left:26px}
  .course-cta .btn{width:100%;justify-content:center}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001s!important;transition-duration:.001s!important}
  html{scroll-behavior:auto}
}