/* =========================================================
   中研供应链 · 六西格玛学院  —  全新视觉体系
   主色: 深墨绿 #0E3B3B / #1B5E5A   强调: 暖橙 #E8833A
   背景: 米白 #F7F4EC   深色: #0B2E2E
   ========================================================= */
:root{
  --ink:#0E3B3B;
  --ink-2:#1B5E5A;
  --ink-3:#2E7D76;
  --accent:#E8833A;
  --accent-2:#F2A65A;
  --paper:#F7F4EC;
  --white:#FFFFFF;
  --dark:#0B2E2E;
  --text:#24302F;
  --muted:#64716F;
  --line:#E3DED2;
  --radius:14px;
  --shadow:0 10px 30px rgba(11,46,46,.10);
  --shadow-lg:0 24px 60px rgba(11,46,46,.16);
  --font-serif:"Noto Serif SC","Songti SC",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);color:var(--text);background:var(--paper);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink);line-height:1.35;font-weight:700}
.container{max-width:1180px;margin:0 auto;padding:0 22px}
.section{padding:76px 0}
.section-alt{background:var(--white)}
.section-dark{background:linear-gradient(135deg,#0B2E2E 0%,#0E3B3B 60%,#14504D 100%);color:#EAF3F1}
.section-dark h2,.section-dark h3{color:#fff}
.sec-head{max-width:760px;margin:0 auto 44px;text-align:center}
.sec-head .eyebrow{display:inline-block;font-size:13px;letter-spacing:3px;color:var(--accent);font-weight:700;text-transform:uppercase;margin-bottom:10px}
.sec-head h2{font-size:clamp(26px,4vw,38px);margin-bottom:14px}
.sec-head p{color:var(--muted);font-size:16px}
.section-dark .sec-head p{color:#BFD2CF}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--dark);color:#C9DAD6;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;min-height:38px;gap:12px}
.topbar a{color:#EAF3F1}
.topbar .tb-right{display:flex;gap:18px;align-items:center}
.topbar .tb-tel{color:var(--accent-2);font-weight:700}

/* ---------- 导航 ---------- */
.header{position:sticky;top:0;z-index:999;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:12px}
.brand .logo{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--ink),var(--ink-3));display:flex;align-items:center;justify-content:center;color:#fff;font-family:var(--font-serif);font-size:24px;font-weight:900}
.brand .btxt b{display:block;font-family:var(--font-serif);color:var(--ink);font-size:19px;line-height:1.2}
.brand .btxt span{font-size:11.5px;color:var(--muted);letter-spacing:2px}
.nav-links{display:flex;gap:6px}
.nav-links a{padding:10px 14px;border-radius:8px;font-size:15px;color:var(--text);font-weight:500;transition:.2s}
.nav-links a:hover,.nav-links a.active{color:var(--accent);background:#FBF3E9}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-cta .tel{text-align:right}
.nav-cta .tel small{display:block;font-size:11px;color:var(--muted)}
.nav-cta .tel b{font-size:18px;color:var(--ink);font-family:var(--font-serif)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:999px;font-size:15px;font-weight:700;border:none;cursor:pointer;transition:.25s}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;box-shadow:0 8px 20px rgba(232,131,58,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(232,131,58,.45)}
.btn-ghost{background:transparent;border:1.5px solid rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-line{background:transparent;border:1.5px solid var(--ink);color:var(--ink)}
.btn-line:hover{background:var(--ink);color:#fff}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.hamburger span{width:24px;height:2.5px;background:var(--ink);border-radius:2px;transition:.25s}

/* ---------- Hero ---------- */
.hero{position:relative;background:linear-gradient(120deg,#0B2E2E 0%,#0E3B3B 45%,#17534F 100%);color:#fff;overflow:hidden;padding:96px 0 110px}
.hero::before{content:"\03C3";position:absolute;right:-60px;top:-120px;font-size:520px;line-height:1;font-family:var(--font-serif);color:rgba(255,255,255,.045);font-weight:900;pointer-events:none}
.hero::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:120px;background:linear-gradient(180deg,transparent,var(--paper))}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center;position:relative;z-index:2}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);color:#F6D9BC;padding:7px 16px;border-radius:999px;font-size:13px;margin-bottom:22px}
.hero h1{font-size:clamp(32px,5vw,52px);line-height:1.22;margin-bottom:20px;color:#fff}
.hero h1 em{font-style:normal;color:var(--accent-2)}
.hero .sub{font-size:17px;color:#C4D6D2;max-width:560px;margin-bottom:32px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:38px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:620px}
.hstat{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:16px 14px;text-align:center}
.hstat b{display:block;font-family:var(--font-serif);font-size:26px;color:#fff}
.hstat b i{font-style:normal;color:var(--accent-2);font-size:16px}
.hstat span{font-size:12.5px;color:#A9C3BE}
.hero-card{background:rgba(255,255,255,.97);border-radius:20px;box-shadow:var(--shadow-lg);padding:34px 30px;color:var(--text)}
.hero-card h3{font-size:21px;margin-bottom:6px}
.hero-card .hc-sub{color:var(--muted);font-size:14px;margin-bottom:20px}
.hero-card .form{display:grid;gap:13px}
.hero-card .form input,.hero-card .form select,.hero-card .form textarea{width:100%;padding:12px 15px;border:1.5px solid var(--line);border-radius:10px;font-size:14.5px;font-family:var(--font-sans);background:#FDFCF8;color:var(--text);outline:none;transition:.2s}
.hero-card .form input:focus,.hero-card .form select:focus,.hero-card .form textarea:focus{border-color:var(--ink-3);box-shadow:0 0 0 3px rgba(30,94,90,.12)}
.hero-card .form textarea{resize:vertical;min-height:84px}
.form-tip{font-size:12px;color:var(--muted);text-align:center}
.form-ok{display:none;text-align:center;color:#1B7A4D;background:#E9F7EF;border:1px solid #BEE8CF;border-radius:10px;padding:12px;font-size:14px;margin-top:8px}
.form-err{display:none;text-align:center;color:#B3261E;background:#FDEBEA;border:1px solid #F3C6C2;border-radius:10px;padding:12px;font-size:14px;margin-top:8px}

/* ---------- 信任条 ---------- */
.trustbar{background:var(--white);border-bottom:1px solid var(--line)}
.trustbar .container{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:22px 22px}
.trust-item{display:flex;align-items:center;gap:12px;padding:6px 10px}
.trust-item .ti-ic{width:42px;height:42px;flex:none;border-radius:10px;background:#EEF4F1;color:var(--ink-2);display:flex;align-items:center;justify-content:center}
.trust-item b{display:block;font-size:14.5px;color:var(--ink)}
.trust-item span{font-size:12.5px;color:var(--muted)}

/* ---------- 课程体系 ---------- */
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.course-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.course-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--ink-3)}
.course-card .cc-top{padding:30px 28px 22px;color:#fff;position:relative;overflow:hidden}
.course-card .cc-top::after{content:"\03C3";position:absolute;right:-14px;top:-26px;font-size:150px;font-family:var(--font-serif);color:rgba(255,255,255,.08);font-weight:900}
.cc-black{background:linear-gradient(135deg,#101B1B,#1B3B39)}
.cc-green{background:linear-gradient(135deg,#0F4C43,#1F7A6A)}
.cc-yellow{background:linear-gradient(135deg,#8A5A1E,#C9852B)}
.course-card .cc-top .tag{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);padding:3px 12px;border-radius:999px;font-size:12px;margin-bottom:12px}
.course-card .cc-top h3{color:#fff;font-size:23px;margin-bottom:6px}
.course-card .cc-top p{font-size:13.5px;color:rgba(255,255,255,.75)}
.course-card .cc-body{padding:24px 28px;flex:1}
.course-card .cc-body li{display:flex;gap:10px;font-size:14px;color:var(--text);padding:6px 0;align-items:flex-start}
.course-card .cc-body li::before{content:"✓";color:var(--accent);font-weight:900;flex:none}
.course-card .cc-foot{padding:18px 28px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}
.course-card .cc-foot .price b{font-family:var(--font-serif);font-size:22px;color:var(--ink)}
.course-card .cc-foot .price span{font-size:12px;color:var(--muted)}
.course-card .cc-foot a{color:var(--accent);font-weight:700;font-size:14px}

/* ---------- DMAIC 时间线 ---------- */
.dmaic{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:d}
.dmaic-item{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px 20px;text-align:center;position:relative;transition:.25s}
.dmaic-item:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.dmaic-item .dnum{width:52px;height:52px;margin:0 auto 14px;border-radius:50%;background:linear-gradient(135deg,var(--ink),var(--ink-3));color:#fff;font-family:var(--font-serif);font-weight:900;font-size:22px;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(14,59,59,.3)}
.dmaic-item h4{font-size:17px;margin-bottom:8px}
.dmaic-item p{font-size:13px;color:var(--muted)}

/* ---------- 为什么选择 ---------- */
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.why-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:30px 26px;transition:.25s}
.why-card:hover{background:rgba(255,255,255,.09)}
.why-card .w-ic{width:54px;height:54px;border-radius:14px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:flex;align-items:center;justify-content:center;margin-bottom:18px;box-shadow:0 8px 20px rgba(232,131,58,.35)}
.why-card h3{font-size:18px;color:#fff;margin-bottom:10px}
.why-card p{font-size:13.5px;color:#B9CDC9}

/* ---------- 师资 ---------- */
.teacher-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.teacher{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;text-align:center;transition:.25s}
.teacher:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.teacher .t-avatar{width:74px;height:74px;margin:0 auto 14px;border-radius:50%;background:linear-gradient(135deg,var(--ink-2),var(--ink-3));color:#fff;font-family:var(--font-serif);font-size:26px;font-weight:900;display:flex;align-items:center;justify-content:center}
.teacher h4{font-size:18px}
.teacher .t-title{color:var(--accent);font-size:13px;font-weight:700;margin:4px 0 10px}
.teacher p{font-size:13px;color:var(--muted)}

/* ---------- 学员评价 ---------- */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;position:relative}
.review::before{content:"“";position:absolute;top:6px;left:22px;font-family:var(--font-serif);font-size:60px;color:#EFE7D8;line-height:1}
.review .stars{color:var(--accent);font-size:16px;margin-bottom:10px}
.review p{font-size:14px;color:var(--text);margin-bottom:16px}
.review .who{display:flex;align-items:center;gap:10px}
.review .who .w-av{width:38px;height:38px;border-radius:50%;background:#EEF4F1;color:var(--ink-2);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}
.review .who b{display:block;font-size:14px}
.review .who span{font-size:12px;color:var(--muted)}

/* ---------- FAQ ---------- */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{background:var(--white);border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:20px 24px;font-weight:700;font-size:15.5px;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--accent);font-weight:400;transition:.25s;flex:none}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-a{padding:0 24px 20px;font-size:14.5px;color:var(--muted)}

/* ---------- CTA ---------- */
.cta-band{background:linear-gradient(120deg,var(--accent),var(--accent-2));border-radius:22px;display:flex;align-items:center;justify-content:space-between;gap:26px;padding:42px 48px;color:#fff;box-shadow:var(--shadow-lg)}
.cta-band h2{color:#fff;font-size:clamp(22px,3vw,30px);margin-bottom:8px}
.cta-band p{color:#FDF3E9;font-size:15px}
.cta-band .btn-dark{background:var(--dark);color:#fff;padding:14px 34px}
.cta-band .btn-dark:hover{transform:translateY(-2px)}

/* ---------- 页脚 ---------- */
.footer{background:var(--dark);color:#A9C3BE;font-size:14px}
.footer .container{padding:64px 22px 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer .f-brand b{font-family:var(--font-serif);font-size:20px;color:#fff;display:block;margin-bottom:10px}
.footer .f-brand p{font-size:13.5px;line-height:1.9}
.footer ul li{margin-bottom:10px}
.footer ul a:hover{color:var(--accent-2)}
.footer .f-contact li{display:flex;gap:10px;align-items:flex-start;margin-bottom:12px}
.footer .f-contact .fi{color:var(--accent-2);flex:none}
.footer .f-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;font-size:12.5px;color:#7FA39E;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* ---------- 面包屑/页头 ---------- */
.page-hero{background:linear-gradient(120deg,#0B2E2E,#0E3B3B 55%,#1B5E5A);color:#fff;padding:64px 0 66px;position:relative;overflow:hidden}
.page-hero::after{content:"\03C3";position:absolute;right:-30px;top:-70px;font-size:320px;font-family:var(--font-serif);color:rgba(255,255,255,.05);font-weight:900}
.page-hero h1{color:#fff;font-size:clamp(28px,4vw,40px);margin-bottom:10px}
.page-hero .crumb{font-size:13.5px;color:#A9C3BE}
.page-hero .crumb a{color:#D9E6E3}
.page-hero .crumb a:hover{color:var(--accent-2)}
.page-hero .lead{color:#C4D6D2;font-size:15.5px;max-width:720px;margin-top:8px}

/* ---------- 通用内容排版 ---------- */
.prose{max-width:860px;margin:0 auto}
.prose h2{font-size:24px;margin:34px 0 14px;padding-left:14px;border-left:4px solid var(--accent)}
.prose h3{font-size:19px;margin:24px 0 10px}
.prose p{margin-bottom:16px;font-size:15.5px;line-height:2}
.prose ul,.prose ol{margin:0 0 18px 24px}
.prose ul li{list-style:disc;margin-bottom:8px;font-size:15px}
.prose ol li{list-style:decimal;margin-bottom:8px;font-size:15px}
.prose blockquote{border-left:4px solid var(--ink-3);background:#EFF5F2;padding:16px 20px;border-radius:0 10px 10px 0;margin:20px 0;color:var(--ink);font-size:15px}
.prose table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;background:var(--white);border-radius:10px;overflow:hidden}
.prose th{background:var(--ink);color:#fff;padding:12px 14px;text-align:left;font-weight:600}
.prose td{padding:11px 14px;border-bottom:1px solid var(--line)}
.prose tr:nth-child(even){background:#FAF8F2}
.prose img{border-radius:12px;margin:20px 0}
.prose a{color:var(--ink-3);font-weight:600;border-bottom:1px solid rgba(30,94,90,.3)}
.article-meta{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:13px;margin:16px 0 8px}
.article-meta span{display:inline-flex;align-items:center;gap:6px}

/* ---------- 文章列表 ---------- */
.article-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.article-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.25s;display:flex;flex-direction:column}
.article-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--ink-3)}
.article-card .ac-cat{display:inline-block;background:#EEF4F1;color:var(--ink-2);font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;margin-bottom:14px;width:fit-content}
.article-card h3{font-size:19px;margin-bottom:10px;line-height:1.5}
.article-card p{font-size:14px;color:var(--muted);margin-bottom:16px;flex:1}
.article-card .ac-foot{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12.5px;border-top:1px solid var(--line);padding-top:14px}
.article-card .ac-foot a{color:var(--accent);font-weight:700}
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:34px}
.filter-bar a{padding:8px 20px;border-radius:999px;border:1.5px solid var(--line);font-size:14px;color:var(--muted);background:var(--white);transition:.2s}
.filter-bar a.active,.filter-bar a:hover{background:var(--ink);border-color:var(--ink);color:#fff}
.pager{display:flex;justify-content:center;gap:8px;margin-top:44px}
.pager a,.pager span{padding:9px 17px;border-radius:8px;border:1.5px solid var(--line);font-size:14px;background:var(--white)}
.pager a:hover{border-color:var(--ink);color:var(--ink)}
.pager .cur{background:var(--ink);color:#fff;border-color:var(--ink)}

/* ---------- 课程页特有 ---------- */
.course-hero{background:linear-gradient(120deg,#0B2E2E,#123F3D 60%,#1B5E5A);color:#fff;padding:70px 0;position:relative;overflow:hidden}
.course-hero::after{content:"\03C3";position:absolute;right:-40px;top:-90px;font-size:380px;font-family:var(--font-serif);color:rgba(255,255,255,.05);font-weight:900}
.course-hero .container{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.course-hero h1{color:#fff;font-size:clamp(28px,4vw,42px);margin-bottom:16px}
.course-hero p{color:#C4D6D2;font-size:16px;max-width:560px}
.ch-price{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:16px;padding:30px;text-align:center}
.ch-price .cp-label{font-size:13px;color:#A9C3BE;letter-spacing:2px}
.ch-price .cp-num{font-family:var(--font-serif);font-size:44px;color:var(--accent-2);margin:6px 0 4px}
.ch-price .cp-num small{font-size:18px}
.ch-price p{font-size:13px;color:#A9C3BE;margin-bottom:18px}
.outline{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.outline .ol-item{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:18px 20px;display:flex;gap:14px;align-items:flex-start}
.outline .ol-item .ol-n{width:34px;height:34px;flex:none;border-radius:9px;background:linear-gradient(135deg,var(--ink),var(--ink-3));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.outline .ol-item b{display:block;font-size:15px;color:var(--ink);margin-bottom:3px}
.outline .ol-item span{font-size:12.5px;color:var(--muted)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.comp-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.comp-card h3{font-size:18px;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.comp-card ul li{display:flex;gap:10px;font-size:14px;padding:7px 0;align-items:flex-start}
.comp-card ul li::before{content:"✓";color:var(--accent);font-weight:900;flex:none}
.flow-steps{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin:0}
.flow-steps .fs{background:var(--white);border:1px solid var(--line);border-radius:10px;padding:16px 10px;text-align:center}
.flow-steps .fs b{display:block;font-family:var(--font-serif);font-size:16px;color:var(--ink);margin-bottom:4px}
.flow-steps .fs span{font-size:11.5px;color:var(--muted)}

/* ---------- 关于页 ---------- */
.about-lead{font-size:17px;color:var(--muted);line-height:2;margin-bottom:20px}
.milestone{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.mile{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;text-align:center}
.mile b{display:block;font-family:var(--font-serif);font-size:34px;color:var(--ink)}
.mile b i{font-style:normal;color:var(--accent)}
.mile span{font-size:13px;color:var(--muted)}

/* ---------- 后台 ---------- */
.admin-body{background:#F0F3F1;font-family:var(--font-sans)}
.admin-wrap{max-width:1120px;margin:0 auto;padding:26px 20px 60px}
.admin-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;gap:14px;flex-wrap:wrap}
.admin-top h1{font-size:22px}
.admin-nav{display:flex;gap:8px;margin-bottom:22px;flex-wrap:wrap}
.admin-nav button{padding:10px 22px;border-radius:9px;border:1.5px solid var(--line);background:var(--white);font-size:14px;cursor:pointer;font-weight:600;color:var(--text)}
.admin-nav button.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.panel{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:22px;margin-bottom:20px}
.panel h2{font-size:17px;margin-bottom:16px}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:22px}
.stat-box{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:20px}
.stat-box b{display:block;font-family:var(--font-serif);font-size:30px;color:var(--ink)}
.stat-box span{font-size:13px;color:var(--muted)}
.table-wrap{overflow-x:auto}
table.data{width:100%;border-collapse:collapse;font-size:13.5px}
table.data th{background:#F4F6F4;text-align:left;padding:11px 12px;color:var(--ink);font-weight:700;border-bottom:2px solid var(--line);white-space:nowrap}
table.data td{padding:11px 12px;border-bottom:1px solid #EEF0EC;vertical-align:top}
table.data tr:hover td{background:#FAFBF9}
.tag{display:inline-block;padding:2px 10px;border-radius:999px;font-size:11.5px;font-weight:700}
.tag-pub{background:#E9F7EF;color:#1B7A4D}
.tag-draft{background:#FEF3E2;color:#9A6B1F}
.tag-unread{background:#FDEBEA;color:#B3261E}
.btn-sm{padding:6px 14px;font-size:12.5px;border-radius:7px;border:1px solid var(--line);background:var(--white);cursor:pointer;font-weight:600}
.btn-sm:hover{border-color:var(--ink);color:var(--ink)}
.btn-danger{color:#B3261E;border-color:#F0C4C0}
.btn-danger:hover{background:#FDEBEA;border-color:#B3261E;color:#B3261E}
.modal-bg{position:fixed;inset:0;background:rgba(11,30,30,.55);display:none;align-items:center;justify-content:center;z-index:1000;padding:20px}
.modal-bg.open{display:flex}
.modal{background:var(--white);border-radius:14px;max-width:760px;width:100%;max-height:90vh;overflow-y:auto;padding:28px}
.modal h2{font-size:19px;margin-bottom:18px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-grid .full{grid-column:1/-1}
.form-grid label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:6px}
.form-grid input,.form-grid select,.form-grid textarea{width:100%;padding:10px 13px;border:1.5px solid var(--line);border-radius:9px;font-size:14px;font-family:var(--font-sans);outline:none}
.form-grid textarea{min-height:220px;resize:vertical;font-family:Consolas,monospace;font-size:13px}
.form-grid input:focus,.form-grid select:focus,.form-grid textarea:focus{border-color:var(--ink-3)}
.modal-foot{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}
.admin-login{max-width:420px;margin:80px auto;background:var(--white);border:1px solid var(--line);border-radius:16px;padding:38px;box-shadow:var(--shadow-lg)}
.admin-login h1{font-size:22px;text-align:center;margin-bottom:6px}
.admin-login .al-sub{text-align:center;color:var(--muted);font-size:13.5px;margin-bottom:26px}
.admin-login input{width:100%;padding:13px 15px;border:1.5px solid var(--line);border-radius:10px;font-size:15px;margin-bottom:14px;outline:none}
.admin-login input:focus{border-color:var(--ink-3)}
.admin-login button{width:100%;padding:13px;border:none;border-radius:10px;background:linear-gradient(135deg,var(--ink),var(--ink-3));color:#fff;font-size:15px;font-weight:700;cursor:pointer}
.msg-box{display:none;padding:12px;border-radius:9px;font-size:13.5px;margin-bottom:14px}
.msg-box.err{display:block;background:#FDEBEA;color:#B3261E;border:1px solid #F3C6C2}
.msg-box.ok{display:block;background:#E9F7EF;color:#1B7A4D;border:1px solid #BEE8CF}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px){
  .hero-grid,.course-hero .container{grid-template-columns:1fr;gap:40px}
  .course-grid,.why-grid,.teacher-grid,.review-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .dmaic{grid-template-columns:repeat(3,1fr)}
  .hero-stats{grid-template-columns:repeat(2,1fr);max-width:100%}
}
@media (max-width: 768px){
  .section{padding:54px 0}
  .nav-links{display:none;position:absolute;top:76px;left:0;right:0;background:var(--white);flex-direction:column;padding:14px 22px 22px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 8px;font-size:16px;border-bottom:1px solid #F1EDE3}
  .hamburger{display:flex}
  .nav-cta .tel{display:none}
  .course-grid,.why-grid,.teacher-grid,.review-grid,.article-grid,.two-col,.outline{grid-template-columns:1fr}
  .dmaic{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero{padding:64px 0 84px}
  .trustbar .container{grid-template-columns:repeat(2,1fr)}
  .cta-band{flex-direction:column;text-align:center;padding:32px 24px}
  .flow-steps{grid-template-columns:repeat(2,1fr)}
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .form-grid{grid-template-columns:1fr}
  .milestone{grid-template-columns:repeat(2,1fr)}
  .article-grid{grid-template-columns:1fr}
}
@media (max-width: 420px){
  .hero-stats{grid-template-columns:1fr 1fr}
  .trustbar .container{grid-template-columns:1fr}
  body{font-size:15px}
}