/* 前台通用样式 */
:root{
  --brand:#4f46e5; --brand2:#7c3aed; --brand-soft:#eef2ff; --bg:#f5f6fa; --card:#fff;
  --text:#0f172a; --muted:#64748b; --line:#e8eaf0; --ok:#16a34a; --err:#dc2626;
  --shadow:0 10px 30px rgba(79,70,229,.08);
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,'Microsoft YaHei',sans-serif;
  background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}

.topbar{display:flex;align-items:center;justify-content:space-between;
  padding:14px 24px;background:rgba(255,255,255,.85);backdrop-filter:blur(10px);
  box-shadow:0 1px 0 var(--line);position:sticky;top:0;z-index:10}
.brand{font-weight:800;font-size:19px;background:linear-gradient(135deg,var(--brand),var(--brand2));
  -webkit-background-clip:text;background-clip:text;color:transparent;letter-spacing:.5px}
.nav a{margin-left:18px;color:var(--muted);font-size:15px;transition:color .15s}
.nav a:hover{color:var(--brand)}
.btn-mini{background:var(--brand);color:#fff;padding:6px 14px;border-radius:20px}

.hero{position:relative;text-align:center;padding:84px 20px 96px;color:#fff;overflow:hidden;
  background:radial-gradient(1200px 600px at 20% -10%,rgba(255,255,255,.18),transparent 60%),
             linear-gradient(135deg,var(--brand),var(--brand2))}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(60px);opacity:.45}
.hero::before{width:340px;height:340px;background:#a5b4fc;top:-120px;right:-80px}
.hero::after{width:280px;height:280px;background:#c4b5fd;bottom:-120px;left:-60px}
.hero h1{position:relative;font-size:38px;margin:0 0 14px;font-weight:800;letter-spacing:1px}
.hero p{position:relative;margin:0 0 26px;font-size:17px;opacity:.92}
.cta{position:relative;display:inline-block;background:#fff;color:var(--brand);font-weight:700;
  padding:14px 36px;border-radius:30px;box-shadow:0 12px 30px rgba(0,0,0,.18);transition:transform .15s,box-shadow .15s}
.cta:hover{transform:translateY(-3px);box-shadow:0 18px 38px rgba(0,0,0,.22)}

.container{max-width:960px;margin:0 auto;padding:24px 16px}

.flash{padding:12px 16px;border-radius:10px;margin:0 0 16px;font-size:14px}
.flash-success{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}
.flash-error{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}

.section-title{font-size:22px;margin:36px 0 18px;font-weight:800;color:var(--text);text-align:center}

/* 套餐卡片 */
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.plan{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:26px 22px;
  display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s,border-color .15s}
.plan:hover{transform:translateY(-5px);box-shadow:0 16px 36px rgba(79,70,229,.14);border-color:transparent}
.plan-name{font-size:19px;font-weight:700}
.plan-price{font-size:30px;font-weight:800;color:var(--brand);margin:12px 0}
.plan-unit{font-size:13px;color:var(--muted);font-weight:500}
.plan-desc{color:var(--muted);font-size:14px;flex:1}
.plan-buy{margin-top:18px}
.buy-btn{width:100%;border:0;background:linear-gradient(135deg,var(--brand),var(--brand2));
  color:#fff;padding:13px;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .15s,box-shadow .15s}
.buy-btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(79,70,229,.3)}

/* 会员卡片 */
.member-card{display:flex;gap:18px;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:16px;align-items:center}
.member-card.big{margin-bottom:18px}
.m-label{font-size:12px;color:var(--muted)}
.m-name{font-weight:700}
.m-type{font-weight:600;color:var(--brand)}
.m-avatar{width:54px;height:54px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:700}
.m-info .m-name{font-size:18px}
.m-sub{color:var(--muted);font-size:13px}

.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:16px 0}
.stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center}
.stat-num{font-weight:800;color:var(--brand)}
.stat-lbl{font-size:12px;color:var(--muted)}

/* 订单 */
.orders{display:flex;flex-direction:column;gap:10px}
.order{display:flex;justify-content:space-between;align-items:center;background:#fff;
  border:1px solid var(--line);border-radius:12px;padding:14px}
.o-name{font-weight:600}.o-date{font-size:12px;color:var(--muted)}
.o-amount{font-weight:700;color:var(--ok)}

/* 认证表单 */
.auth{max-width:420px}
.auth-title{text-align:center;margin:10px 0 22px}
.form label{display:block;margin:14px 0 6px;font-size:14px;color:var(--muted)}
.form input,.form select{width:100%;padding:12px;border:1px solid var(--line);border-radius:10px;
  font-size:15px;background:#fff}
.submit{width:100%;margin-top:22px;border:0;border-radius:10px;padding:13px;
  background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:16px;font-weight:700;cursor:pointer}
.switch{text-align:center;margin-top:16px;color:var(--muted);font-size:14px}
.empty{color:var(--muted);text-align:center;padding:20px}

/* 拆单系统介绍 */
.intro{background:#fff;border-bottom:1px solid var(--line)}
.intro-inner{max-width:960px;margin:0 auto;padding:56px 16px}
.intro-title{text-align:center;font-size:26px;margin:0 0 12px;font-weight:800;
  background:linear-gradient(135deg,var(--brand),var(--brand2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.intro-desc{max-width:700px;margin:0 auto 36px;text-align:center;color:var(--muted);font-size:15px}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px}
.feature{background:var(--bg);border:1px solid var(--line);border-radius:16px;padding:26px 22px;
  text-align:center;transition:transform .15s,box-shadow .15s,border-color .15s}
.feature:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(79,70,229,.12);
  border-color:transparent}
.f-icon{width:58px;height:58px;margin:0 auto 14px;display:flex;align-items:center;justify-content:center;
  font-size:28px;border-radius:16px;background:linear-gradient(135deg,var(--brand-soft),#f5f3ff)}
.f-name{font-size:17px;font-weight:700;margin-bottom:8px}
.f-text{font-size:14px;color:var(--muted)}

/* 工作流程 */
.workflow{max-width:960px;margin:0 auto;padding:8px 16px 56px}
.flow-title{text-align:center;font-size:22px;margin:0 0 28px;font-weight:800;color:var(--text)}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:18px}
.step{position:relative;background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:26px 22px;transition:transform .15s,box-shadow .15s}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.step-no{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;
  border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;
  font-weight:800;margin-bottom:14px}
.step-name{font-size:16px;font-weight:700;margin-bottom:6px}
.step-text{font-size:14px;color:var(--muted)}

/* 行动号召 */
.cta-band{text-align:center;padding:56px 20px;color:#fff;margin-top:8px;
  background:radial-gradient(900px 400px at 80% 0%,rgba(255,255,255,.16),transparent 55%),
             linear-gradient(135deg,var(--brand2),var(--brand))}
.cta-band h2{font-size:26px;margin:0 0 12px;font-weight:800}
.cta-band p{margin:0 0 24px;opacity:.92;font-size:15px}
.cta-band .cta{background:#fff;color:var(--brand2)}

.foot{text-align:center;color:var(--muted);font-size:13px;padding:34px 20px;background:#fff;
  border-top:1px solid var(--line)}
.foot a{margin:0 10px;color:var(--muted)}
.foot a:hover{color:var(--brand)}