:root{
  --navy:#0E2F63; --navy2:#16427f; --navy-soft:#eaf1fb;
  --gold:#E6B455; --gold2:#d99d33;
  --blue:#3FA7E8; --teal:#27B9A5; --orange:#F2913D; --purple:#8B7BD8; --red:#E0645B;
  --ink:#21324b; --gray:#5c6b82; --line:#e3eaf4;
  --bg:#f4f7fc; --card:#ffffff;
  --body:"Noto Sans CJK SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --hand:"LXGW WenKai","Noto Sans CJK SC","KaiTi",sans-serif;
  --shadow:0 10px 30px rgba(16,44,92,.10);
  --shadow-sm:0 4px 14px rgba(16,44,92,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--body);color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
::selection{background:rgba(230,180,85,.35)}
a{color:var(--navy2);text-decoration:none}
img{max-width:100%;display:block}

/* ===== 侧边栏 ===== */
.sidebar{position:fixed;top:0;left:0;width:268px;height:100vh;overflow-y:auto;
  background:linear-gradient(180deg,rgba(9,25,56,.94) 0%,rgba(13,40,84,.9) 55%,rgba(11,30,68,.94) 100%),
            url(../img/001.jpg) center/cover no-repeat;
  color:#dbe6f7;padding:22px 16px 30px;z-index:60;box-shadow:4px 0 24px rgba(8,26,58,.25)}
.sidebar .brand-img{width:88%;margin:2px auto 0;filter:drop-shadow(0 4px 10px rgba(0,0,0,.3))}
.sidebar .brand-sub{text-align:center;font-size:12px;letter-spacing:2px;color:#9fb6da;margin:6px 0 16px}
.search-box{position:relative;margin-bottom:14px}
.search-box input{width:100%;padding:11px 36px 11px 14px;border-radius:12px;border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.10);color:#fff;font-size:14px;outline:none;font-family:var(--body)}
.search-box input::placeholder{color:#a9bddc}
.search-box input:focus{background:rgba(255,255,255,.18);border-color:var(--gold)}
.search-box .ico{position:absolute;right:12px;top:50%;transform:translateY(-50%);color:#cdddf4}
.search-count{font-size:12px;color:var(--gold);margin:-6px 2px 10px;min-height:16px}
.nav{display:flex;flex-direction:column;gap:3px}
.nav a{color:#cdddf4;padding:8px 12px;border-radius:9px;font-size:14px;font-weight:500;display:flex;gap:9px;align-items:center;cursor:pointer}
.nav a .n{font-size:11px;color:#84a0cc;font-weight:700;min-width:20px}
.nav a:hover{background:rgba(255,255,255,.10);color:#fff}
.nav a.active{background:linear-gradient(90deg,var(--gold),var(--gold2));color:#1b3358;font-weight:700}
.nav a.grp{margin-top:9px;font-size:12px;letter-spacing:1px;color:#8fa6cc;text-transform:uppercase;cursor:default}
.nav a.grp:hover{background:none;color:#8fa6cc}
.sidebar-foot{margin-top:22px;font-size:11.5px;color:#8ba3c8;line-height:1.7;border-top:1px solid rgba(255,255,255,.12);padding-top:14px}

/* ===== 主区 ===== */
.main{margin-left:268px;padding:0 46px 80px;max-width:1500px}
.topbar{display:none;position:sticky;top:0;z-index:50;width:100%;box-sizing:border-box;
  background:linear-gradient(90deg,rgba(10,29,63,.92),rgba(16,46,96,.86)),
            url(../img/002.jpg) center 22%/cover no-repeat;
  color:#fff;padding:9px 14px;align-items:center;gap:12px;box-shadow:0 3px 14px rgba(8,26,58,.35)}
.topbar .ham{background:rgba(255,255,255,.12);border:none;color:#fff;font-size:20px;line-height:1;
  width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex:0 0 auto;cursor:pointer}
.topbar .ham:active{background:rgba(255,255,255,.22)}
.top-logo{height:34px;width:auto;display:block}
.overlay{display:none;position:fixed;inset:0;background:rgba(6,18,40,.5);z-index:55}

/* ===== 封面 ===== */
.hero{position:relative;margin:0 -46px 0;padding:74px 64px 66px;color:#fff;overflow:hidden;
  background:linear-gradient(160deg,rgba(8,23,53,.80) 0%,rgba(12,36,80,.66) 58%,rgba(10,28,64,.82) 100%),
            url(../img/003.jpg) center bottom/cover no-repeat}
.hero .deco{position:absolute;border-radius:50%;border:1px solid rgba(230,180,85,.25)}
.hero .d1{width:420px;height:420px;right:-120px;bottom:-160px}
.hero .d2{width:260px;height:260px;right:40px;bottom:-60px;border-color:rgba(255,255,255,.12)}
.hero .kicker{font-size:13px;letter-spacing:4px;color:var(--gold);font-weight:700;margin-bottom:18px}
.hero h1{font-size:52px;line-height:1.18;font-weight:900;letter-spacing:1px}
.hero h1 .hl{color:var(--gold)}
.hero .slogan{font-family:var(--hand);font-size:24px;margin-top:18px;color:#eaf1ff}
.hero .meta{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.hero .meta .m{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:14px;padding:14px 20px;min-width:150px}
.hero .meta .m b{font-size:22px;display:block;color:#fff}
.hero .meta .m span{font-size:13px;color:#bcd0ee}
.hero .cta{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:30px;font-weight:700;font-size:15px;cursor:pointer;border:none}
.btn-gold{background:linear-gradient(90deg,var(--gold),var(--gold2));color:#22385f;box-shadow:0 8px 20px rgba(217,157,51,.35)}
.btn-ghost{background:rgba(255,255,255,.10);color:#fff;border:1px solid rgba(255,255,255,.3)}
.btn:hover{transform:translateY(-2px);transition:.2s}

/* ===== 章节通用 ===== */
section.block{padding-top:46px;scroll-margin-top:20px}
.block-head{display:flex;align-items:center;gap:16px;margin-bottom:26px}
.block-head .no{flex:none;width:58px;height:58px;border-radius:16px;display:grid;place-items:center;
  font-size:24px;font-weight:900;color:#fff;box-shadow:var(--shadow-sm)}
.block-head h2{font-size:30px;font-weight:900;color:var(--navy);letter-spacing:.5px}
.block-head .en{display:block;font-size:12px;letter-spacing:3px;color:var(--gray);font-weight:500;text-transform:uppercase}
h3.h{font-size:21px;font-weight:800;color:var(--navy);margin:34px 0 14px;display:flex;align-items:center;gap:10px}
h3.h::before{content:"";width:7px;height:22px;border-radius:4px;background:linear-gradient(var(--gold),var(--gold2))}
h4.hh{font-size:17px;font-weight:700;color:var(--navy2);margin:22px 0 8px}
p{margin:10px 0;color:#33445f}
.lead{font-size:17px;color:#3d4e6a}
ul.bul,ol.bul{margin:10px 0 10px 4px;padding-left:22px}
ul.bul li,ol.bul li{margin:7px 0;color:#33445f}
ul.bul li::marker{color:var(--gold2)}
.hand{font-family:var(--hand)}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.tag{font-size:12.5px;font-weight:600;padding:4px 12px;border-radius:20px;background:var(--navy-soft);color:var(--navy2)}
.tag.gold{background:#fbf0da;color:#a8761c}.tag.blue{background:#e2f1fb;color:#1c6fa8}
.tag.teal{background:#dcf4ef;color:#158274}.tag.orange{background:#fdebdc;color:#c0651c}
.tag.purple{background:#ece9f9;color:#5d4fb0}

/* 卡片栅格 */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px;margin:18px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow-sm)}
.card .ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:22px;margin-bottom:12px}
.card h5{font-size:16.5px;font-weight:800;color:var(--navy);margin-bottom:6px}
.card p{font-size:14px;color:#5a6a83;margin:0}
.card.tinted{background:linear-gradient(160deg,#f3f8ff,#fff)}

/* 双系统对比 */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:20px 0}
.compare .sys{border-radius:18px;padding:24px;color:#fff;position:relative;overflow:hidden}
.compare .sys.a{background:linear-gradient(160deg,rgba(17,48,92,.88),rgba(24,70,130,.82)),url(../img/004.jpg) center/cover no-repeat}
.compare .sys.b{background:linear-gradient(160deg,#1f9c8b,#2bb79f)}
.compare .sys .badge-t{font-size:12px;letter-spacing:2px;opacity:.85;font-weight:700}
.compare .sys h4{font-size:22px;margin:8px 0 12px;font-weight:900}
.compare .sys ul{list-style:none;padding:0}
.compare .sys li{font-size:14px;margin:8px 0;padding-left:24px;position:relative;opacity:.96}
.compare .sys li::before{content:"✓";position:absolute;left:0;top:0;font-weight:900}
.compare .sys .role{margin-top:14px;font-size:13px;background:rgba(255,255,255,.14);border-radius:10px;padding:9px 13px;font-family:var(--hand)}

/* 五步闭环 */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin:24px 0;counter-reset:f}
.flow .step{background:#fff;border:1.5px solid var(--line);border-radius:16px;padding:18px 14px;text-align:center;position:relative}
.flow .step .circle{width:48px;height:48px;margin:0 auto 10px;border-radius:50%;display:grid;place-items:center;
  color:#fff;font-weight:900;font-size:19px;background:linear-gradient(145deg,var(--navy2),var(--blue))}
.flow .step b{font-size:15px;color:var(--navy);display:block;margin-bottom:4px}
.flow .step span{font-size:12.5px;color:#6a7a93}
.flow .step:not(:last-child)::after{content:"➜";position:absolute;right:-13px;top:32%;color:var(--gold2);font-size:20px;z-index:2}
.flow .step:nth-child(1) .circle{background:linear-gradient(145deg,#2bb79f,#1f9c8b)}
.flow .step:nth-child(2) .circle{background:linear-gradient(145deg,#3FA7E8,#2b7fc4)}
.flow .step:nth-child(3) .circle{background:linear-gradient(145deg,#8B7BD8,#6f5fc0)}
.flow .step:nth-child(4) .circle{background:linear-gradient(145deg,#F2913D,#e07622)}
.flow .step:nth-child(5) .circle{background:linear-gradient(145deg,#E6B455,#d99d33)}

/* 勋章 */
.badges{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;margin:20px 0}
.badge-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px 8px;text-align:center;box-shadow:var(--shadow-sm)}
.badge-card img{width:74px;margin:0 auto 8px}
.badge-card b{font-size:14px;display:block;color:var(--navy)}
.badge-card span{font-size:11.5px;color:#7a8aa3}
.badge-card.lv1{border-top:3px solid #27B9A5}.badge-card.lv2{border-top:3px solid #3FA7E8}
.badge-card.lv3{border-top:3px solid #E6B455}.badge-card.lv4{border-top:3px solid #8B7BD8}
.badge-card.lv5,.badge-card.lv6{border-top:3px solid #d99d33}

/* 截图 figure */
figure.shot{margin:22px 0;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 14px 0;box-shadow:var(--shadow)}
figure.shot img{border-radius:10px;border:1px solid #eef2f8;margin:0 auto;cursor:zoom-in}
figure.shot figcaption{text-align:center;font-size:13.5px;color:#6a7a93;padding:11px 6px;font-weight:500}
figure.shot figcaption b{color:var(--navy2)}
.figs-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.figs-2 figure.shot{margin:0}
.figs-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.figs-3 figure.shot{margin:0}
.figs-4{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.figs-4 figure.shot{margin:0}

/* 提示框 */
.callout{border-radius:14px;padding:15px 18px 15px 56px;position:relative;margin:18px 0;font-size:14.5px;line-height:1.7}
.callout .cico{position:absolute;left:16px;top:15px;font-size:22px}
.callout.tip{background:#fdf4e2;border:1px solid #f3ddb0;color:#8a6420}
.callout.note{background:#e8f1fc;border:1px solid #c7dcf3;color:#245182}
.callout.parent{background:#e4f5f1;border:1px solid #b9e6dd;color:#13695d}
.callout.fun{background:#f1edfa;border:1px solid #d9d0f2;color:#57489c;font-family:var(--hand);font-size:15.5px}
.callout b{font-weight:800}
.callout p{margin:4px 0;color:inherit}

/* 表格 */
.tablewrap{overflow-x:auto;margin:18px 0;border-radius:14px;box-shadow:var(--shadow-sm)}
table.tbl{width:100%;border-collapse:collapse;background:#fff;font-size:14.5px;overflow:hidden}
table.tbl thead th{background:linear-gradient(90deg,var(--navy),var(--navy2));color:#fff;padding:13px 14px;text-align:left;font-weight:700;font-size:14px}
table.tbl td{padding:12px 14px;border-bottom:1px solid #edf1f7;color:#3a4a64}
table.tbl tbody tr:nth-child(even){background:#f7faff}
table.tbl tbody tr:last-child td{border-bottom:none}

/* FAQ */
.faq{display:flex;flex-direction:column;gap:10px;margin:18px 0}
.faq details{background:#fff;border:1px solid var(--line);border-radius:13px;padding:0 18px;box-shadow:var(--shadow-sm)}
.faq summary{cursor:pointer;padding:14px 4px;font-weight:700;color:var(--navy);list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;color:var(--gold2);font-weight:400}
.faq details[open] summary::after{content:"−"}
.faq details .ans{padding:0 0 16px;color:#46566f;font-size:14.5px}

/* 搜索过滤 */
.searching .s-hide{display:none !important}
mark.hl{background:#ffe08a;color:#7a5200;border-radius:3px;padding:0 2px}
.no-result{display:none;text-align:center;padding:60px 20px;color:var(--gray);font-family:var(--hand);font-size:20px}

/* ===== 图片灯箱（捏合缩放/拖动/双击） ===== */
.lightbox{display:none;position:fixed;inset:0;z-index:90;background:rgba(3,10,24,.98);overflow:hidden;touch-action:none}
.lightbox.open{display:flex;align-items:center;justify-content:center}
.lightbox .stage{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;overflow:hidden}
.lightbox img{max-width:100%;max-height:100%;margin:auto;border-radius:6px;transform-origin:center center;
  will-change:transform;touch-action:none;-webkit-user-drag:none;-webkit-user-select:none;user-select:none}
.lightbox .lb-btn{position:absolute;z-index:5;width:44px;height:44px;border-radius:50%;border:none;
  background:rgba(255,255,255,.14);color:#fff;font-size:24px;line-height:1;cursor:pointer;
  display:flex;align-items:center;justify-content:center}
.lightbox .lb-btn:active{background:rgba(255,255,255,.3)}
.lightbox .close{top:calc(12px + env(safe-area-inset-top));right:16px;font-size:28px}
.lightbox .zoom{bottom:calc(18px + env(safe-area-inset-bottom));right:16px;font-size:24px}
.lightbox .hint{position:absolute;left:16px;right:72px;bottom:calc(24px + env(safe-area-inset-bottom));z-index:4;
  text-align:left;color:#aebfdc;font-size:13px;line-height:1.5;pointer-events:none;transition:opacity .6s}

.back-to-top{position:fixed;right:28px;bottom:30px;width:48px;height:48px;border-radius:50%;
  background:linear-gradient(145deg,var(--navy),var(--navy2));color:#fff;border:none;font-size:20px;cursor:pointer;
  box-shadow:0 8px 22px rgba(14,47,99,.4);display:none;z-index:45}
.back-to-top:hover{transform:translateY(-3px)}

/* 封底 */
.backcover{margin:56px -46px 0;padding:60px 64px;color:#fff;text-align:center;border-radius:0;
  background:linear-gradient(160deg,rgba(8,23,53,.88),rgba(14,40,86,.8)),
            url(../img/005.jpg) center/cover no-repeat}
.backcover .vision{font-family:var(--hand);font-size:26px;color:var(--gold);margin:14px 0 8px}
.backcover p{color:#cdddf4;font-size:15px}
.backcover .line{width:70px;height:3px;background:var(--gold);margin:20px auto;border-radius:2px}

/* ===== 响应式 ===== */
@media(max-width:980px){
  .sidebar{transform:translateX(-100%);transition:.28s;box-shadow:none}
  .sidebar.open{transform:translateX(0)}
  .main{margin-left:0;padding:0 14px 60px}
  .topbar{display:flex;width:100vw;margin-left:calc(50% - 50vw);margin-right:calc(50% - 50vw)}
  .overlay.show{display:block}
  .hero,.backcover{width:100vw;margin-left:calc(50% - 50vw);margin-right:calc(50% - 50vw);padding:48px 22px}
  .hero h1{font-size:34px}.hero .slogan{font-size:19px}
  .compare{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr 1fr}
  .flow .step:not(:last-child)::after{display:none}
  .badges{grid-template-columns:repeat(2,1fr)}
  .figs-2{grid-template-columns:1fr}
  .figs-3{grid-template-columns:1fr}
  .figs-4{grid-template-columns:repeat(2,1fr);gap:12px}
  .block-head h2{font-size:23px}
}

/* ===== 打印 / PDF ===== */
@page{size:A4;margin:15mm 13mm 16mm}
@media print{
  body{background:#fff;font-size:12.5px;line-height:1.65}
  .sidebar,.topbar,.overlay,.back-to-top,.lightbox,.search-count,.no-result,.hero .cta{display:none !important}
  .main{margin:0;padding:0;max-width:100%}
  .hero{width:auto;margin:0;border-radius:0;padding:30px 8px;color:#fff;min-height:264mm;
    -webkit-print-color-adjust:exact;print-color-adjust:exact}
  .backcover{width:auto;margin:0;border-radius:0;padding:0 8px;color:#fff;min-height:264mm;
    display:flex;flex-direction:column;align-items:center;justify-content:center;
    -webkit-print-color-adjust:exact;print-color-adjust:exact}
  .hero h1{font-size:38px}.hero .slogan{font-size:19px}
  .hero .meta .m{background:rgba(255,255,255,.12)}
  section.block{padding-top:18px}
  #back{padding-top:0}
  .pb{page-break-before:always}
  figure.shot,.tablewrap,.cards .card,.badge-card,.flow .step,.callout,.faq details{page-break-inside:avoid}
  .cards{gap:10px}.badges{gap:8px}
  .block-head h2{font-size:24px}
  h3.h{font-size:18px;margin:22px 0 10px}
  figure.shot{box-shadow:none;padding:8px 8px 0}
  .figs-3{grid-template-columns:1fr;gap:12px}
  .figs-4{grid-template-columns:repeat(4,1fr) !important;gap:8px}
  .figs-2.keep-2{grid-template-columns:1fr 1fr !important;gap:12px}
  *{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}