/* =============================================================
   薛老师网校·中考冲刺平台 全局样式
   技术支持: xuelaoshi.cn 管理员电话: 15165222880
   配色: 鲜艳活泼 橙/紫/粉 渐变, 移动端优先
   ============================================================= */
:root{
    --primary:#ff6b35;
    --primary-2:#f12711;
    --primary-grad:linear-gradient(135deg,#ff6b35 0%,#f12711 100%);
    --purple:#6c5ce7;
    --purple-2:#a29bfe;
    --purple-grad:linear-gradient(135deg,#6c5ce7 0%,#a29bfe 100%);
    --pink:#e84393;
    --pink-grad:linear-gradient(135deg,#fd79a8 0%,#e84393 100%);
    --green:#00b894;
    --green-grad:linear-gradient(135deg,#00b894 0%,#55efc4 100%);
    --blue:#0984e3;
    --blue-grad:linear-gradient(135deg,#0984e3 0%,#74b9ff 100%);
    --yellow:#fdcb6e;
    --text:#2d3436;
    --text-2:#636e72;
    --text-3:#b2bec3;
    --bg:#f6f7fb;
    --card:#ffffff;
    --border:#eef0f5;
    --radius:14px;
    --radius-lg:20px;
    --shadow:0 4px 20px rgba(45,52,54,.06);
    --shadow-lg:0 12px 40px rgba(45,52,54,.12);
    --success:#00b894;
    --danger:#ff6b6b;
    --warning:#fdcb6e;
    --info:#74b9ff;
    --font:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:15px}
.container{max-width:1180px;margin:0 auto;padding:0 16px}

/* ---------- 滚动公告 ---------- */
.marquee-bar{background:var(--primary-grad);color:#fff;font-size:13px;padding:6px 0;overflow:hidden;display:flex;align-items:center;gap:8px}
.marquee-icon{padding-left:14px;flex-shrink:0}
.marquee-track{flex:1;overflow:hidden}
.marquee-inner{display:inline-flex;white-space:nowrap;animation:marquee 26s linear infinite}
.marquee-inner span{padding-right:60px}
@keyframes marquee{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* ---------- 顶部导航 ---------- */
.site-header{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(0,0,0,.05)}
.header-inner{display:flex;align-items:center;gap:20px;height:62px}
.logo{display:flex;align-items:center;gap:8px;flex-shrink:0}
.logo-icon{font-size:26px;background:var(--primary-grad);width:38px;height:38px;border-radius:12px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(255,107,53,.35)}
.logo-text{font-size:19px;font-weight:800;background:linear-gradient(135deg,#ff6b35,#e84393);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;white-space:nowrap}
.main-nav{display:flex;gap:4px;flex:1;justify-content:center}
.main-nav a{padding:8px 16px;border-radius:50px;font-weight:500;color:var(--text-2);transition:.25s;font-size:15px}
.main-nav a:hover{color:var(--primary);background:rgba(255,107,53,.08)}
.main-nav a.active{color:#fff;background:var(--primary-grad);box-shadow:0 4px 12px rgba(255,107,53,.3)}
.main-nav a.nav-vip{color:#fff;background:linear-gradient(135deg,#f9ca24,#f0932b);box-shadow:0 4px 12px rgba(249,202,36,.4)}
.main-nav a.nav-vip.active{background:linear-gradient(135deg,#f0932b,#e84393)}
.header-right{display:flex;align-items:center;gap:10px;flex-shrink:0}
.user-menu{position:relative;display:inline-block}
.user-chip{display:inline-flex;align-items:center;gap:8px;padding:5px 10px 5px 5px;border-radius:50px;background:#fff;border:1px solid var(--border);font-weight:600;transition:.2s;max-width:180px;min-width:0}
.user-chip:hover{border-color:var(--primary)}
.user-chip span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0;max-width:80px}
.avatar-sm{width:30px;height:30px;border-radius:50%;object-fit:cover;background:#eee;flex-shrink:0}
.vip-badge{background:linear-gradient(135deg,#f9ca24,#f0932b);color:#fff;font-size:10px;font-weight:800;padding:2px 6px;border-radius:6px;letter-spacing:1px;box-shadow:0 2px 6px rgba(249,202,36,.45);flex-shrink:0}
.user-dropdown{position:absolute;right:0;top:calc(100% + 8px);background:#fff;border-radius:14px;box-shadow:var(--shadow-lg);min-width:170px;padding:8px;opacity:0;visibility:hidden;transform:translateY(-6px);transition:.25s;z-index:210}
.user-dropdown::before{content:'';position:absolute;top:-6px;right:18px;width:12px;height:12px;background:#fff;transform:rotate(45deg);box-shadow:-2px -2px 5px rgba(0,0,0,.08);z-index:-1}
.user-menu:hover .user-dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.user-dropdown a{display:block;padding:10px 14px;border-radius:10px;font-size:14px;color:var(--text-2)}
.user-dropdown a:hover{background:#fff5f0;color:var(--primary)}
.nav-toggle{display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;background:none;border:none;padding:0;width:44px;height:44px;margin-right:-10px;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.nav-toggle span{width:24px;height:2.5px;background:var(--text);border-radius:2px;transition:.3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;border-radius:50px;padding:11px 26px;font-size:15px;font-weight:600;transition:.25s;line-height:1.4}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--primary-grad);color:#fff;box-shadow:0 4px 14px rgba(255,107,53,.35)}
.btn-primary:hover{box-shadow:0 8px 22px rgba(255,107,53,.45);transform:translateY(-1px)}
.btn-purple{background:var(--purple-grad);color:#fff;box-shadow:0 4px 14px rgba(108,92,231,.35)}
.btn-green{background:var(--green-grad);color:#fff;box-shadow:0 4px 14px rgba(0,184,148,.35)}
.btn-pink{background:var(--pink-grad);color:#fff}
.btn-ghost{background:#fff;color:var(--text-2);border:1.5px solid var(--border)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-outline-primary{background:transparent;color:var(--primary);border:1.5px solid var(--primary)}
.btn-sm{padding:7px 16px;font-size:13px}
.btn-lg{padding:14px 40px;font-size:16px}
.btn-block{width:100%}
.btn-danger{background:linear-gradient(135deg,#ff6b6b,#ee5253);color:#fff}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none!important}

.page-body{min-height:60vh;padding-bottom:40px}

/* ---------- 首页 Hero ---------- */
.hero{background:linear-gradient(135deg,#ff6b35 0%,#f12711 45%,#e84393 100%);color:#fff;position:relative;overflow:hidden;padding:64px 0 90px}
.hero::before,.hero::after{content:'';position:absolute;border-radius:50%;background:rgba(255,255,255,.08)}
.hero::before{width:420px;height:420px;right:-120px;top:-140px}
.hero::after{width:260px;height:260px;left:-80px;bottom:-100px}
.hero-inner{position:relative;z-index:2;display:flex;align-items:center;gap:40px}
.hero-text{flex:1.2}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.35);padding:6px 16px;border-radius:50px;font-size:13px;font-weight:600;backdrop-filter:blur(4px);margin-bottom:18px}
.hero h1{font-size:44px;font-weight:900;line-height:1.25;margin-bottom:14px;letter-spacing:1px}
.hero h1 .grad-underline{display:inline-block;position:relative}
.hero p{font-size:17px;opacity:.92;margin-bottom:28px;max-width:560px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-cta .btn{background:#fff;color:var(--primary);box-shadow:0 8px 24px rgba(0,0,0,.18)}
.hero-cta .btn.btn-purple{background:var(--purple-grad);color:#fff}
.hero-cta .btn.btn-soft{background:rgba(255,255,255,.16);color:#fff;border:1.5px solid rgba(255,255,255,.4)}
.hero-stats{display:flex;gap:36px;margin-top:36px;flex-wrap:wrap}
.hero-stats .stat b{font-size:26px;font-weight:900;display:block}
.hero-stats .stat span{font-size:13px;opacity:.85}
.hero-illus{flex:0 0 360px;display:flex;justify-content:center}
.hero-card{background:rgba(255,255,255,.14);border:1.5px solid rgba(255,255,255,.3);border-radius:22px;padding:26px;backdrop-filter:blur(8px);width:100%}
.hero-card .sub-card-title{font-size:13px;opacity:.85;margin-bottom:14px}
.hero-card .sub-row{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.15)}
.hero-card .sub-row:last-child{border:none}
.hero-card .sub-ico{width:42px;height:42px;border-radius:12px;background:rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.hero-card .sub-row b{font-size:15px}
.hero-card .sub-row span{font-size:12px;opacity:.8}

/* ---------- 区块 ---------- */
.section{padding:44px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:24px;gap:16px}
.section-title{font-size:24px;font-weight:800;display:flex;align-items:center;gap:10px}
.section-title .ico{font-size:26px}
.section-title small{font-size:13px;color:var(--text-3);font-weight:400;margin-left:8px}
.section-more{color:var(--text-3);font-size:14px;font-weight:600;transition:.2s}
.section-more:hover{color:var(--primary)}

/* ---------- 科目卡片 ---------- */
.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.subject-card{background:#fff;border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow);border:2px solid transparent;transition:.3s;position:relative;overflow:hidden;cursor:pointer}
.subject-card::before{content:'';position:absolute;top:0;left:0;right:0;height:5px;background:var(--subject-color)}
.subject-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--subject-color)}
.subject-ico{width:58px;height:58px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:30px;margin-bottom:14px;background:color-mix(in srgb,var(--subject-color) 14%,#fff)}
.subject-card h3{font-size:20px;font-weight:800;margin-bottom:6px}
.subject-card p{color:var(--text-2);font-size:13.5px;margin-bottom:14px;min-height:40px}
.subject-meta{display:flex;gap:16px;font-size:13px;color:var(--text-3);border-top:1px dashed var(--border);padding-top:12px}
.subject-meta b{color:var(--subject-color)}

/* ---------- 知识点 ---------- */
.kp-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.kp-card{background:#fff;border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);display:flex;gap:14px;align-items:flex-start;transition:.3s;border:1.5px solid transparent;position:relative}
.kp-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--kp-color,#6c5ce7)}
.kp-ico{width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0;background:color-mix(in srgb,var(--kp-color,#6c5ce7) 13%,#fff)}
.kp-card h4{font-size:15.5px;font-weight:700;margin-bottom:4px}
.kp-card p{font-size:12.5px;color:var(--text-2);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.kp-card .kp-count{position:absolute;top:16px;right:16px;background:color-mix(in srgb,var(--kp-color,#6c5ce7) 12%,#fff);color:var(--kp-color,#6c5ce7);font-size:12px;font-weight:700;padding:3px 10px;border-radius:20px}

/* ---------- 课程卡片 ---------- */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:20px}
.course-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);transition:.3s;display:flex;flex-direction:column}
.course-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.course-cover{position:relative;aspect-ratio:16/9;overflow:hidden}
.course-cover img{width:100%;height:100%;object-fit:cover;transition:.5s}
.course-card:hover .course-cover img{transform:scale(1.06)}
.course-cover .price-tag{position:absolute;top:12px;left:12px;background:var(--primary-grad);color:#fff;font-weight:800;font-size:13px;padding:4px 12px;border-radius:20px;box-shadow:0 4px 10px rgba(255,107,53,.4)}
.course-cover .price-tag.free{background:var(--green-grad)}
.course-cover .rec-tag{position:absolute;top:12px;right:12px;background:rgba(0,0,0,.45);color:#fff;font-size:12px;padding:3px 10px;border-radius:16px;backdrop-filter:blur(4px)}
.course-body{padding:18px;display:flex;flex-direction:column;flex:1}
.course-body h3{font-size:16.5px;font-weight:700;margin-bottom:6px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.course-body .course-sub{font-size:13px;color:var(--text-2);margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.course-meta{display:flex;align-items:center;gap:14px;color:var(--text-3);font-size:12.5px;padding-top:12px;border-top:1px dashed var(--border)}
.course-meta .teacher{display:flex;align-items:center;gap:6px;min-width:0}
.course-meta .teacher img{width:24px;height:24px;border-radius:50%}
.course-meta .teacher span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 新闻 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.news-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);transition:.3s}
.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.news-cover{aspect-ratio:16/9;overflow:hidden;position:relative}
.news-cover img{width:100%;height:100%;object-fit:cover}
.news-cover .news-cat{position:absolute;left:12px;bottom:12px;background:var(--purple-grad);color:#fff;font-size:12px;padding:3px 12px;border-radius:16px}
.news-body{padding:16px}
.news-body h3{font-size:15.5px;font-weight:700;margin-bottom:8px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{font-size:13px;color:var(--text-2);margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{font-size:12px;color:var(--text-3);display:flex;gap:12px}

/* ---------- 机构 ---------- */
.partner-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.partner-card{background:#fff;border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow);transition:.3s;position:relative;overflow:hidden}
.partner-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.partner-card .level-badge{position:absolute;top:16px;right:16px;font-size:12px;font-weight:700;padding:3px 12px;border-radius:16px;color:#fff}
.partner-card .level-gold{background:linear-gradient(135deg,#f9ca24,#f0932b)}
.partner-card .level-silver{background:linear-gradient(135deg,#b2bec3,#dfe6e9)}
.partner-card .level-normal{background:linear-gradient(135deg,#74b9ff,#0984e3)}
.partner-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.partner-logo{width:54px;height:54px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px;background:#fff5f0;border:1px solid var(--border)}
.partner-head h3{font-size:16.5px;font-weight:800}
.partner-head .st-count{font-size:12px;color:var(--text-3)}
.partner-card p{font-size:13px;color:var(--text-2);margin-bottom:12px}
.partner-tags{display:flex;gap:8px;flex-wrap:wrap;font-size:12px;color:var(--text-2)}
.partner-tags span{background:#f8f9fa;padding:4px 10px;border-radius:8px;border:1px solid var(--border)}

/* ---------- VIP 页面 ---------- */
.vip-hero{background:linear-gradient(135deg,#6c5ce7 0%,#a29bfe 50%,#e84393 100%);border-radius:24px;padding:44px;color:#fff;margin-top:32px;position:relative;overflow:hidden;text-align:center}
.vip-hero::before{content:'👑';position:absolute;font-size:200px;right:-20px;top:-40px;opacity:.12;transform:rotate(-15deg)}
.vip-hero h2{font-size:32px;font-weight:900;margin-bottom:10px}
.vip-hero p{font-size:15px;opacity:.9;max-width:560px;margin:0 auto 20px}
.vip-benefits{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;margin-top:18px}
.vip-benefits span{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600}
.vip-benefits .b-ico{width:34px;height:34px;border-radius:10px;background:rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:17px}
.plan-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-top:30px}
.plan-card{background:#fff;border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow);position:relative;transition:.3s;text-align:center;border:2px solid transparent}
.plan-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.plan-card.hot{border-color:var(--primary)}
.plan-card.hot::before{content:'最受欢迎';position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--primary-grad);color:#fff;font-size:12px;font-weight:700;padding:4px 18px;border-radius:20px;white-space:nowrap}
.plan-name{font-size:17px;font-weight:800;color:var(--text-2);margin-bottom:6px}
.plan-price{font-size:40px;font-weight:900;color:var(--plan-color,#ff6b35);margin-bottom:4px}
.plan-price small{font-size:14px;font-weight:600;color:var(--text-3)}
.plan-origin{color:var(--text-3);font-size:13px;text-decoration:line-through;margin-bottom:16px}
.plan-desc{font-size:13.5px;color:var(--text-2);margin-bottom:20px;min-height:60px;line-height:1.7}
.plan-tag{display:inline-block;background:color-mix(in srgb,var(--plan-color,#ff6b35) 12%,#fff);color:var(--plan-color,#ff6b35);font-size:12px;font-weight:700;padding:2px 12px;border-radius:14px;margin-bottom:10px}

/* ---------- 刷题 ---------- */
.quiz-wrap{max-width:820px;margin:28px auto 0}
.quiz-top{display:flex;align-items:center;justify-content:space-between;background:#fff;border-radius:var(--radius);padding:14px 20px;box-shadow:var(--shadow);margin-bottom:18px;flex-wrap:wrap;gap:10px}
.quiz-progress{flex:1;min-width:180px;display:flex;align-items:center;gap:12px}
.progress-bar{flex:1;height:8px;background:#f0f2f7;border-radius:10px;overflow:hidden}
.progress-bar .bar{height:100%;background:var(--primary-grad);border-radius:10px;transition:.4s}
.quiz-top .cnt{font-weight:800;color:var(--primary)}
.quiz-card{background:#fff;border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow);margin-bottom:18px;animation:fadeUp .4s}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
.quiz-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.quiz-tag{font-size:12px;font-weight:700;padding:3px 12px;border-radius:16px}
.quiz-tag.subject{color:#fff;background:var(--sub-color,#6c5ce7)}
.quiz-tag.type{color:var(--purple);background:#f3f0ff}
.quiz-tag.diff{color:#fff;background:var(--diff-color,#00b894)}
.quiz-tag.score{color:#fff;background:var(--yellow);}
.quiz-stem{font-size:17.5px;font-weight:600;line-height:1.9;margin-bottom:22px;white-space:normal}
.quiz-stem img{max-width:100%;border-radius:10px;margin-top:10px}
.options-list{display:flex;flex-direction:column;gap:12px}
.option-item{display:flex;align-items:flex-start;gap:14px;border:2px solid var(--border);border-radius:14px;padding:15px 18px;cursor:pointer;transition:.25s;background:#fff;font-size:15.5px;line-height:1.7}
.option-item:hover{border-color:var(--primary);background:#fff8f4}
.option-item .opt-key{width:32px;height:32px;border-radius:50%;background:#f0f2f7;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;flex-shrink:0;transition:.25s;color:var(--text-2)}
.option-item.selected{border-color:var(--primary);background:#fff2ec}
.option-item.selected .opt-key{background:var(--primary-grad);color:#fff}
.option-item.correct{border-color:var(--success);background:#eafff8}
.option-item.correct .opt-key{background:var(--success);color:#fff}
.option-item.wrong{border-color:var(--danger);background:#ffeaea}
.option-item.wrong .opt-key{background:var(--danger);color:#fff}
.option-item.disabled{pointer-events:none;opacity:.85}
.quiz-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:22px}
.quiz-input{width:100%;min-height:90px;border:2px solid var(--border);border-radius:14px;padding:14px 18px;font-size:15.5px;line-height:1.7;resize:vertical;transition:.25s}
.quiz-input:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 4px rgba(255,107,53,.1)}

/* ---------- 解析 ---------- */
.analysis-box{border-radius:var(--radius-lg);padding:26px;margin-bottom:18px;animation:fadeUp .4s}
.analysis-box .a-head{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;margin-bottom:14px}
.analysis-box .a-ico{width:38px;height:38px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:18px}
.analysis-box.correct{background:linear-gradient(135deg,#eafff8,#d4fbe9);border:1.5px solid #55efc4}
.analysis-box.correct .a-ico{background:var(--green-grad);color:#fff}
.analysis-box.wrong{background:linear-gradient(135deg,#ffeaea,#ffd6d6);border:1.5px solid #ffb3b3}
.analysis-box.wrong .a-ico{background:linear-gradient(135deg,#ff6b6b,#ee5253);color:#fff}
.analysis-answer{background:#fff;border-radius:12px;padding:14px 18px;font-size:15px;margin-bottom:12px;border-left:4px solid var(--primary)}
.analysis-answer b{color:var(--primary)}
.analysis-text{font-size:15px;line-height:2;color:var(--text-2)}
.analysis-kp{background:#fff;border-radius:12px;padding:14px 18px;font-size:14px;margin-top:12px;border-left:4px solid var(--purple);color:var(--text-2)}
.analysis-kp b{color:var(--purple)}
.analysis-kp .kp-title{font-weight:800;display:block;margin-bottom:6px}

/* ---------- 弹窗 ---------- */
.modal-mask{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;visibility:hidden;transition:.3s;backdrop-filter:blur(4px)}
.modal-mask.show{opacity:1;visibility:visible}
.modal-box{background:#fff;border-radius:20px;max-width:420px;width:100%;padding:32px;text-align:center;transform:scale(.9);transition:.3s}
.modal-mask.show .modal-box{transform:scale(1)}
.modal-box .m-ico{font-size:56px;margin-bottom:14px}
.modal-box h3{font-size:21px;font-weight:800;margin-bottom:10px}
.modal-box p{color:var(--text-2);font-size:14px;margin-bottom:22px;line-height:1.8}
.modal-btns{display:flex;gap:12px;justify-content:center}
.modal-close{position:absolute;top:14px;right:14px;background:#f0f2f7;border:none;width:32px;height:32px;border-radius:50%;font-size:16px;color:var(--text-2)}

/* ---------- 认证页 ---------- */
.auth-wrap{min-height:calc(100vh - 200px);display:flex;align-items:center;justify-content:center;padding:40px 16px}
.auth-card{background:#fff;border-radius:24px;box-shadow:var(--shadow-lg);width:100%;max-width:440px;padding:38px 34px;position:relative;overflow:hidden}
.auth-card::before{content:'';position:absolute;top:0;left:0;right:0;height:6px;background:var(--primary-grad)}
.auth-head{text-align:center;margin-bottom:26px}
.auth-head .a-ico{font-size:44px;margin-bottom:10px}
.auth-head h1{font-size:24px;font-weight:900}
.auth-head p{color:var(--text-3);font-size:13.5px;margin-top:4px}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:var(--text-2)}
.form-control{width:100%;border:2px solid var(--border);border-radius:12px;padding:12px 16px;transition:.25s;background:#fafbfd}
.form-control:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 4px rgba(255,107,53,.1);background:#fff}
textarea.form-control{resize:vertical;min-height:80px}
.select-wrap{position:relative}
.select-wrap::after{content:'▾';position:absolute;right:16px;top:50%;transform:translateY(-50%);color:var(--text-3);pointer-events:none}
.form-control[type=password]{letter-spacing:2px}
.form-hint{font-size:12px;color:var(--text-3);margin-top:6px}
.auth-switch{text-align:center;margin-top:18px;font-size:14px;color:var(--text-2)}
.auth-switch a{color:var(--primary);font-weight:700}
.role-picker{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:18px}
.role-picker label{position:relative;cursor:pointer}
.role-picker input{position:absolute;opacity:0}
.role-item{border:2px solid var(--border);border-radius:12px;padding:12px 6px;text-align:center;transition:.25s;display:block;font-size:12.5px;font-weight:700;color:var(--text-2)}
.role-picker input:checked + .role-item{border-color:var(--primary);background:#fff2ec;color:var(--primary)}
.role-picker .r-ico{display:block;font-size:22px;margin-bottom:4px}

/* ---------- 登录页 ---------- */
.login-bg{background:linear-gradient(135deg,#ff6b35 0%,#f12711 40%,#6c5ce7 100%);position:relative;overflow:hidden}
.login-bg::before,.login-bg::after{content:'';position:absolute;border-radius:50%;background:rgba(255,255,255,.07)}
.login-bg::before{width:380px;height:380px;top:-120px;right:-100px}
.login-bg::after{width:300px;height:300px;bottom:-120px;left:-80px}
.alert{border-radius:12px;padding:14px 18px;margin-bottom:16px;font-size:14px;font-weight:600}
.alert-success{background:#eafff8;color:#00b894;border:1px solid #55efc4}
.alert-error{background:#ffeaea;color:#ee5253;border:1px solid #ffb3b3}
.alert-info{background:#eef4ff;color:#0984e3;border:1px solid #a3cbff}

/* ---------- 数据看板卡片 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:18px}
.stat-card{background:#fff;border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow);display:flex;align-items:center;gap:16px;transition:.3s}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.stat-ico{width:54px;height:54px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:25px;flex-shrink:0}
.stat-card b{font-size:24px;font-weight:900;display:block;line-height:1.2}
.stat-card span{font-size:13px;color:var(--text-2)}

/* ---------- 列表卡片 ---------- */
.list-card{background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}
.list-card .l-item{display:flex;align-items:center;gap:16px;padding:18px 24px;border-bottom:1px solid var(--border);transition:.2s;position:relative}
.list-card .l-item:last-child{border-bottom:none}
.list-card .l-item:hover{background:#fffaf7}
.l-item .l-ico{width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;font-size:20px;background:#fff2ec;flex-shrink:0}
.l-item .l-main{flex:1;min-width:0}
.l-item .l-title{font-weight:700;font-size:15px;margin-bottom:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.l-item .l-sub{font-size:12.5px;color:var(--text-3)}
.l-item .l-right{flex-shrink:0;display:flex;align-items:center;gap:10px}
.l-item .l-arrow{color:var(--text-3)}

/* ---------- 面包屑/页头 ---------- */
.page-hero{background:var(--purple-grad);color:#fff;padding:38px 0;position:relative;overflow:hidden}
.page-hero::after{content:'';position:absolute;width:220px;height:220px;border-radius:50%;background:rgba(255,255,255,.1);right:-60px;top:-80px}
.page-hero h1{font-size:28px;font-weight:900;margin-bottom:6px;position:relative;z-index:2}
.page-hero p{font-size:14px;opacity:.9;position:relative;z-index:2}
.crumb{font-size:12.5px;opacity:.85;margin-top:8px;position:relative;z-index:2}
.crumb a:hover{text-decoration:underline}

/* ---------- 筛选 ---------- */
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:22px}
.filter-bar .filter-tag{padding:8px 18px;border-radius:30px;background:#fff;border:1.5px solid var(--border);font-size:13.5px;font-weight:600;color:var(--text-2);cursor:pointer;transition:.2s}
.filter-bar .filter-tag:hover{border-color:var(--primary);color:var(--primary)}
.filter-bar .filter-tag.active{background:var(--primary-grad);color:#fff;border-color:transparent;box-shadow:0 4px 12px rgba(255,107,53,.3)}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
table.table{width:100%;border-collapse:collapse;min-width:640px}
.table th{background:#fafbfd;font-size:13px;color:var(--text-2);text-align:left;padding:14px 18px;font-weight:700;border-bottom:1px solid var(--border);white-space:nowrap}
.table td{padding:14px 18px;border-bottom:1px solid var(--border);font-size:14px;vertical-align:middle}
.table tr:last-child td{border-bottom:none}
.table tr:hover td{background:#fffaf7}
.table .t-title{font-weight:600;max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.table .t-title a:hover{color:var(--primary)}

/* ---------- 徽章 ---------- */
.badge{display:inline-block;font-size:12px;font-weight:700;padding:3px 12px;border-radius:16px;white-space:nowrap}
.badge-green{background:#eafff8;color:#00b894}
.badge-red{background:#ffeaea;color:#ee5253}
.badge-blue{background:#eef4ff;color:#0984e3}
.badge-purple{background:#f3f0ff;color:#6c5ce7}
.badge-orange{background:#fff2ec;color:#ff6b35}
.badge-yellow{background:#fff8e1;color:#f0932b}
.badge-gray{background:#f0f2f7;color:#636e72}

/* ---------- 分页 ---------- */
.pager{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:28px;flex-wrap:wrap}
.pager a,.pager span.total{display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:38px;padding:0 12px;border-radius:10px;background:#fff;border:1.5px solid var(--border);font-size:14px;font-weight:600;color:var(--text-2);transition:.2s}
.pager a:hover{border-color:var(--primary);color:var(--primary)}
.pager a.active{background:var(--primary-grad);color:#fff;border-color:transparent}
.pager span.total{background:none;border:none;color:var(--text-3);font-weight:400}

/* ---------- 空状态 ---------- */
.empty-state{text-align:center;padding:60px 20px;color:var(--text-3)}
.empty-icon{font-size:52px;margin-bottom:12px}
.empty-state p{font-size:15px}

/* ---------- 移动底部导航 ---------- */
.mobile-tabbar{display:none}
.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%) translateY(20px);background:rgba(45,52,54,.92);color:#fff;padding:12px 26px;border-radius:30px;font-size:14px;font-weight:600;z-index:2000;opacity:0;visibility:hidden;transition:.3s;backdrop-filter:blur(6px);max-width:88%;text-align:center}
.toast.show{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}

/* ---------- 详情页 ---------- */
.detail-layout{display:grid;grid-template-columns:1fr 340px;gap:24px;margin-top:28px}
.detail-main{background:#fff;border-radius:var(--radius-lg);padding:34px;box-shadow:var(--shadow)}
.detail-main h1{font-size:26px;font-weight:900;line-height:1.5;margin-bottom:14px}
.article-content{font-size:15.5px;line-height:2.1;color:#4a4a4a}
.article-content img{max-width:100%;border-radius:12px;margin:14px 0}
.article-content h1,.article-content h2,.article-content h3{margin:24px 0 12px;color:var(--text);font-weight:800;line-height:1.5}
.article-content h2{font-size:20px}
.article-content h3{font-size:17px}
.article-content p{margin-bottom:14px}
.article-content strong{color:var(--text);font-weight:700}
.article-content ul,.article-content ol{padding-left:22px;margin:10px 0 16px}
.article-content li{margin:6px 0}
.article-content table{width:100%;border-collapse:collapse;margin:14px 0;font-size:14px}
.article-content th,.article-content td{border:1px solid var(--border);padding:10px 12px;text-align:left;vertical-align:top}
.article-content th{background:#f8f9fb;font-weight:700}
.article-content tr:nth-child(even){background:#fafbfc}
.article-content code{background:#f1f3f5;padding:2px 6px;border-radius:4px;font-family:'SF Mono',Consolas,monospace;font-size:.9em}
.article-content pre{background:#f8f9fb;border:1px solid var(--border);border-radius:12px;padding:14px 16px;overflow-x:auto;margin:14px 0}
.article-content pre code{background:none;padding:0}
.detail-side{display:flex;flex-direction:column;gap:18px}
.side-card{background:#fff;border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow)}
.side-card h3{font-size:16px;font-weight:800;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card .teacher-info{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.side-card .teacher-info img{width:56px;height:56px;border-radius:50%}
.side-card .teacher-info b{font-size:16px}
.side-card .teacher-info span{font-size:12.5px;color:var(--text-3)}
.price-row{font-size:30px;font-weight:900;color:var(--primary);margin-bottom:16px}
.price-row .origin{font-size:15px;color:var(--text-3);text-decoration:line-through;font-weight:400;margin-left:8px}
.lesson-list .lesson-item,.side-card .lesson-item{display:flex;align-items:center;gap:10px;padding:12px 0;border-bottom:1px dashed var(--border);font-size:14px;color:var(--text-2);cursor:pointer;transition:.2s;text-decoration:none}
.lesson-list .lesson-item:hover,.side-card .lesson-item:hover{color:var(--primary)}
.lesson-list .lesson-item:last-child,.side-card .lesson-item:last-child{border:none}
.lesson-item .l-num{width:28px;height:28px;border-radius:8px;background:#f0f2f7;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0}
.lesson-list .lesson-item.current .l-num{background:var(--primary-grad);color:#fff}
.lesson-item .l-title{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lesson-item .l-time{font-size:12px;color:var(--text-3);flex-shrink:0}

/* ---------- 视频播放 ---------- */
.video-box{background:#000;border-radius:16px;overflow:hidden;position:relative;aspect-ratio:16/9;margin-bottom:20px}
.video-box video{width:100%;height:100%;object-fit:contain}
.video-lock{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:rgba(0,0,0,.72);color:#fff;gap:14px;text-align:center;padding:20px}
.video-lock .lock-ico{font-size:52px}
.video-lock h3{font-size:20px;font-weight:800}
.video-lock p{font-size:14px;opacity:.85}

/* ---------- 我的中心 ---------- */
.mine-hero{background:var(--primary-grad);border-radius:22px;padding:30px;color:#fff;margin-top:28px;display:flex;align-items:center;gap:22px;flex-wrap:wrap;position:relative;overflow:hidden}
.mine-hero::after{content:'';position:absolute;width:200px;height:200px;border-radius:50%;background:rgba(255,255,255,.1);right:-50px;top:-70px}
.mine-avatar{width:76px;height:76px;border-radius:50%;border:3px solid rgba(255,255,255,.5);background:#fff;object-fit:cover}
.mine-info{flex:1;min-width:200px}
.mine-info h2{font-size:21px;font-weight:900;display:flex;align-items:center;gap:10px}
.mine-info .role-tag{background:rgba(255,255,255,.2);font-size:12px;padding:2px 12px;border-radius:12px;font-weight:700}
.mine-info p{font-size:13px;opacity:.85;margin-top:4px}
.mine-vip{background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.3);border-radius:14px;padding:12px 20px;text-align:center;backdrop-filter:blur(4px)}
.mine-vip b{display:block;font-size:17px}
.mine-vip span{font-size:12px;opacity:.9}

/* ---------- 页脚 ---------- */
.site-footer{background:#232632;color:#a5aab8;margin-top:40px;padding-top:48px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:34px}
.footer-col h4{color:#fff;font-size:16px;font-weight:800;margin-bottom:16px}
.footer-col a{display:block;color:#a5aab8;font-size:14px;padding:5px 0;transition:.2s}
.footer-col a:hover{color:#fff;padding-left:4px}
.footer-brand .logo-text{color:#fff;-webkit-text-fill-color:#fff;font-size:19px}
.footer-brand p{font-size:13.5px;line-height:1.9;margin-top:14px;max-width:320px}
.footer-contact p{font-size:13.5px;margin-bottom:10px}
.footer-contact .phone-link{color:var(--primary);font-weight:800;font-size:17px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;font-size:12.5px;text-align:center;color:#7a7f8e}

/* ---------- 响应式 ---------- */
@media (max-width:992px){
    .hero-inner{flex-direction:column;text-align:center}
    .hero-illus{flex-basis:auto;width:100%;max-width:420px}
    .hero-cta,.hero-stats{justify-content:center}
    .hero h1{font-size:34px}
    .detail-layout{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
    .header-inner{gap:10px;height:56px}
    .logo-text{font-size:16px}
    .main-nav{position:fixed;top:0;right:-280px;width:280px;height:100vh;background:#fff;flex-direction:column;padding:80px 20px 20px;box-shadow:-10px 0 40px rgba(0,0,0,.15);transition:.35s;z-index:300;gap:6px}
    .main-nav.open{right:0}
    .main-nav a{padding:14px 18px;border-radius:12px;font-size:16px}
    .main-nav.open::before{content:'';position:fixed;top:0;left:0;right:280px;bottom:0;background:rgba(0,0,0,.35);z-index:-1}
    .nav-toggle{display:flex}
    .header-right{gap:4px}
    .header-right .btn{display:none}
    .user-chip{padding:3px;border-radius:50%;background:transparent;border:none;max-width:none}
    .user-chip span,.user-chip .vip-badge{display:none}
    .avatar-sm{width:34px;height:34px}
    .subject-grid{grid-template-columns:1fr 1fr;gap:14px}
    .hero{padding:44px 0 64px}
    .hero h1{font-size:29px}
    .hero-stats{gap:24px}
    .section{padding:32px 0}
    .section-title{font-size:20px}
    .stat-grid{grid-template-columns:1fr 1fr}
    .mobile-tabbar{display:flex;position:fixed;bottom:0;left:0;right:0;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);box-shadow:0 -4px 20px rgba(0,0,0,.08);z-index:200;padding:8px 0 calc(8px + env(safe-area-inset-bottom))}
    .mobile-tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;font-size:11px;color:var(--text-3);font-weight:600}
    .mobile-tabbar a span{font-size:21px}
    .mobile-tabbar a.on{color:var(--primary)}
    .mobile-tabbar a.on span{transform:translateY(-2px)}
    .page-body{padding-bottom:76px}
    .site-footer{padding-bottom:60px}
    .footer-grid{grid-template-columns:1fr;gap:24px}
    .role-picker{grid-template-columns:repeat(4,1fr);gap:6px}
    .quiz-card{padding:22px 18px}
    .detail-main{padding:22px 18px}
    .plan-grid{grid-template-columns:1fr 1fr}
    .news-grid{grid-template-columns:1fr}
}
@media (max-width:480px){
    .subject-grid{grid-template-columns:1fr 1fr}
    .stat-grid{grid-template-columns:1fr 1fr}
    .plan-grid{grid-template-columns:1fr}
    .hero h1{font-size:25px}
    .hero-cta .btn{flex:1;min-width:140px}
    .course-grid{grid-template-columns:1fr 1fr;gap:12px}
    .course-body{padding:12px}
    .course-body h3{font-size:14px}
    .course-meta{font-size:11px;gap:8px}
    .course-cover .price-tag{font-size:11px;padding:3px 8px}
}

/* ---------- 工具类 ---------- */
.flex{display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}
.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mb-8{margin-bottom:8px}.mb-16{margin-bottom:16px}
.text-primary{color:var(--primary)}.text-green{color:var(--success)}.text-red{color:var(--danger)}.text-muted{color:var(--text-2)}.text-center{text-align:center}
.hidden{display:none}
.gradient-text{background:linear-gradient(135deg,#ff6b35,#e84393);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.fw-8{font-weight:800}