/* ===== 桌面贴图工作台 · 便签墙 ===== */
:root{
  --blue:#4d90fe;      /* 官方 logo 蓝 */
  --blue-d:#3b7de0;
  --ink:#0f1b33;       /* 深墨蓝(任务栏/页脚) */
  --navy:#16233f;      /* 标题 */
  --green:#80c342;     /* logo 绿(点缀) */
  --red:#e94242;       /* logo 红(点缀) */
  --yellow:#ffc700;    /* logo 黄(点缀) */
  --bg:#f6f8fb;        /* 冷白纸 */
  --card:#ffffff;
  --muted:#5b6b85;
  --line:#e2e9f3;
  --soft:#eef3fb;
  --wall-grid:#e8effa;
  --grad:linear-gradient(135deg,#0f1b33 0%,#3b7de0 55%,#4d90fe 100%);
  --radius:16px;
  --shadow:0 8px 30px rgba(15,27,51,.10);
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--blue-d)}
h1,h2,h3,h4{line-height:1.3;color:var(--navy)}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:8px 14px;z-index:99;border-radius:0 0 8px 0}
.skip:focus{left:0}

/* ===== 顶部任务栏 dock ===== */
.nav{position:sticky;top:0;z-index:60;padding:14px 16px}
.nav-in{display:flex;align-items:center;gap:6px;width:max-content;max-width:100%;margin:0 auto;background:rgba(15,27,51,.94);backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.08);border-radius:999px;padding:8px 10px;box-shadow:0 12px 34px rgba(15,27,51,.28)}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:16px;color:#fff;letter-spacing:.2px;padding:2px 10px 2px 4px}
.brand:hover{color:#fff}
.logo{width:30px;height:30px;border-radius:7px;flex:none;background:#fff}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{padding:8px 13px;border-radius:999px;color:#c6d2e8;font-size:14.5px;font-weight:600}
.nav-links a:hover{background:rgba(255,255,255,.1);color:#fff}
.nav-links a.on{color:#0f1b33;background:#fff}
.nav-links a.nav-cta{background:var(--blue);color:#fff;margin-left:6px;padding:9px 18px;border-radius:999px;box-shadow:0 6px 16px rgba(77,144,254,.4)}
.nav-links a.nav-cta:hover{color:#fff;background:var(--blue-d)}
.menu-btn{display:none;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:999px;width:42px;height:42px;font-size:18px;color:#fff;cursor:pointer}

/* ===== 通用按钮 ===== */
.btn{display:inline-block;padding:13px 26px;border-radius:999px;font-weight:700;font-size:15.5px;transition:.18s;border:none;cursor:pointer}
.btn-pri{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(77,144,254,.30)}
.btn-pri:hover{color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(77,144,254,.4)}
.btn-ghost{background:#fff;color:var(--navy);border:1.5px solid var(--line)}
.btn-ghost:hover{color:var(--blue);border-color:var(--blue)}
.btn-sm{padding:9px 18px;font-size:14px}

/* ===== Hero ===== */
.hero{background:radial-gradient(1200px 520px at 80% -10%,#dce8ff 0%,transparent 55%),linear-gradient(180deg,#eef3fb 0%,var(--bg) 100%);padding:72px 0 76px;overflow:hidden}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center}
.hero h1{font-size:42px;font-weight:800;letter-spacing:-.5px;margin-bottom:18px}
.hero .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:17px;color:var(--muted);max-width:34em}
.tag{display:flex;flex-wrap:wrap;gap:9px;margin:22px 0 26px}
.tag span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:13.5px;color:var(--navy);font-weight:600;box-shadow:0 2px 8px rgba(15,27,51,.05)}
.tag span::before{content:"✓ ";color:var(--blue);font-weight:800}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}

/* ===== 贴图便签墙 ===== */
.pin-wall{position:relative;height:400px;border-radius:20px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background-color:#fbfdff;background-image:linear-gradient(var(--wall-grid) 1px,transparent 1px),linear-gradient(90deg,var(--wall-grid) 1px,transparent 1px);background-size:44px 44px}
.sticky{position:absolute;background:rgba(255,255,255,.92);backdrop-filter:blur(2px);border:1px solid #e7edf6;border-radius:12px;box-shadow:0 18px 40px rgba(15,27,51,.18);padding:14px 14px 12px}
.sticky .tack{position:absolute;top:-8px;left:50%;transform:translateX(-50%);width:15px;height:15px;border-radius:50%;box-shadow:0 2px 5px rgba(15,27,51,.3)}
.sticky .tack::after{content:"";position:absolute;inset:4px;border-radius:50%;background:rgba(255,255,255,.35)}
.sticky .tack.b{background:radial-gradient(circle at 35% 30%,#9cc2ff,#4d90fe 65%)}
.sticky .tack.y{background:radial-gradient(circle at 35% 30%,#ffe08a,#ffc700 65%)}
.sticky .tack.r{background:radial-gradient(circle at 35% 30%,#ff9d9d,#e94242 65%)}
.sticky .tack.g{background:radial-gradient(circle at 35% 30%,#b7e88a,#80c342 65%)}
.sticky.s1{top:32px;left:30px;width:200px;transform:rotate(-3deg)}
.sticky.s2{top:96px;right:26px;width:210px;transform:rotate(2.6deg)}
.sticky.s3{bottom:30px;left:50%;transform:translateX(-50%) rotate(-1.6deg);width:232px}
.sticky .minibar{display:flex;gap:5px;margin-bottom:10px}
.sticky .minibar i{width:8px;height:8px;border-radius:50%;background:#d8e0ec;display:block}
.sticky .swatch{height:58px;border-radius:8px;background:linear-gradient(120deg,#4d90fe,#7fb2ff);margin-bottom:10px}
.sticky .ln{height:7px;border-radius:4px;background:#e3ebf6;margin-bottom:8px}
.sticky .ln.s{width:62%}
.sticky .dots{display:flex;gap:7px;margin-bottom:10px}
.sticky .dots i{width:16px;height:16px;border-radius:5px;display:block}
.sticky .dots i.c1{background:#4d90fe}
.sticky .dots i.c2{background:#ffc700}
.sticky .dots i.c3{background:#e94242}
.sticky .dots i.c4{background:#80c342}
.sticky .coord{display:block;margin-top:6px;font-family:var(--mono);font-size:10.5px;color:#7a8aa8;text-align:right;letter-spacing:.3px}
.crosshair{position:absolute;right:20px;bottom:16px;width:44px;height:44px}
.crosshair span{position:absolute;inset:8px;border:2px solid var(--blue);border-radius:50%;box-shadow:0 0 0 7px rgba(77,144,254,.12)}
.crosshair::before{content:"";position:absolute;left:50%;top:0;width:2px;height:100%;transform:translateX(-50%);background:var(--blue)}
.crosshair::after{content:"";position:absolute;top:50%;left:0;height:2px;width:100%;transform:translateY(-50%);background:var(--blue)}

/* ===== 区块 ===== */
.section{padding:64px 0}
.section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:680px;margin-bottom:38px}
.sec-head h2{font-size:30px;font-weight:800;letter-spacing:-.3px;margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:16px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--blue);font-weight:700;font-size:13.5px;letter-spacing:.5px;text-transform:uppercase;margin-bottom:10px}
.eyebrow::before{content:"";width:8px;height:8px;border-radius:2px;background:linear-gradient(135deg,var(--blue),var(--green))}

/* 工具面板(竖向工具栏 + 功能清单) */
.tool-panel{display:grid;grid-template-columns:auto 1fr;gap:26px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:0 6px 24px rgba(15,27,51,.06)}
.tool-bar{display:flex;flex-direction:column;gap:8px;padding:10px;background:var(--soft);border-radius:14px}
.tbtn{width:44px;height:44px;border-radius:11px;display:flex;align-items:center;justify-content:center;color:#5b6b85;background:transparent;transition:.15s}
.tbtn.on{background:#fff;color:var(--blue);box-shadow:0 3px 10px rgba(15,27,51,.1)}
.tbtn svg{width:22px;height:22px}
.feat-list{display:grid;grid-template-columns:1fr 1fr;gap:16px 26px}
.feat{display:flex;gap:14px;align-items:flex-start;padding:14px;border:1px solid transparent;border-radius:12px;transition:.15s}
.feat:hover{background:#f7fafe;border-color:var(--line)}
.feat-icon{width:40px;height:40px;border-radius:10px;background:var(--soft);color:var(--blue);display:flex;align-items:center;justify-content:center;flex:none}
.feat-icon svg{width:21px;height:21px}
.feat h3{font-size:16px;margin-bottom:4px}
.feat p{color:var(--muted);font-size:13.5px}

/* 左右图文 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;margin:52px 0}
.split.rev .split-img{order:2}
.split-img img{border-radius:16px;box-shadow:var(--shadow)}
.split-img figcaption{font-size:13px;color:var(--muted);margin-top:10px;text-align:center}
.split-body h3{font-size:24px;margin-bottom:14px}
.split-body p{color:var(--muted);margin-bottom:12px}

/* 步骤时间线 */
.steps{list-style:none;counter-reset:st;margin:26px 0}
.step{position:relative;padding:0 0 26px 58px;counter-increment:st}
.step::before{content:counter(st);position:absolute;left:0;top:0;width:38px;height:38px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;box-shadow:0 5px 14px rgba(77,144,254,.3)}
.step::after{content:"";position:absolute;left:18px;top:44px;bottom:2px;width:2px;background:var(--line)}
.step:last-child::after{display:none}
.step h3{font-size:17px;margin-bottom:6px}
.step p{color:var(--muted);font-size:14.5px}

/* 表格 */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:#fff}
table{width:100%;border-collapse:collapse;font-size:14.5px}
th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--soft);color:var(--navy);font-weight:700;white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#f7fbff}
td.center,th.center{text-align:center}
td.ok{color:#059669;font-weight:700}

/* 提示框 */
.tip{background:#eef6ff;border:1px solid #cfe0ff;border-left:4px solid var(--blue);border-radius:10px;padding:16px 18px;margin:20px 0;font-size:14.5px;color:var(--navy)}
.tip b{color:var(--blue)}
.callout{background:#fffbe6;border:1px solid #f0e6b8;border-left:4px solid #e6b800;border-radius:10px;padding:16px 18px;margin:20px 0;font-size:14.5px;color:#6b5d1a}
.callout b{color:#8a7a00}

/* 速查表 */
.key-table{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:20px 0}
.key-table .kt-head{background:var(--ink);color:#fff;padding:12px 18px;font-weight:700;font-size:14px;letter-spacing:.3px}
.key-table table{border:0}
.key-table th,.key-table td{border-bottom:1px solid var(--line)}
.kbd{display:inline-block;background:#fff;border:1px solid var(--line);border-bottom:3px solid #c3d4ea;border-radius:6px;padding:1px 8px;font-family:var(--mono);font-size:13px;color:var(--navy);font-weight:700;margin:0 2px}
.badge{display:inline-block;background:var(--soft);color:var(--blue);border-radius:6px;padding:2px 9px;font-size:12.5px;font-weight:700}

/* 平台卡(顶栏 = logo 四色条) */
.platform-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.platform-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 4px 16px rgba(15,27,51,.05);transition:.2s}
.platform-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.platform-top{height:8px;background:linear-gradient(90deg,#4d90fe 0 25%,#ffc700 25% 50%,#e94242 50% 75%,#80c342 75% 100%)}
.platform-card .pc-body{padding:24px}
.platform-card h3{font-size:18px;margin-bottom:8px}
.platform-card p{color:var(--muted);font-size:14px;margin-bottom:16px}
.platform-card .sys{font-size:13px;color:var(--muted);border-top:1px dashed var(--line);padding-top:12px}

/* 面包屑 */
.breadcrumb{font-size:13.5px;color:var(--muted);padding:18px 0 0}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb .sep{margin:0 8px;color:#b9c8dd}

/* 文章双栏 */
.article-layout{display:grid;grid-template-columns:1fr 280px;gap:40px;padding:34px 0 60px;align-items:start}
.article-main{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px 46px;box-shadow:0 4px 18px rgba(15,27,51,.05);min-width:0}
.article-main h1{font-size:32px;letter-spacing:-.3px;margin-bottom:14px}
.article-meta{font-size:13.5px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:24px}
.article-meta span{margin-right:18px}
.article-body{font-size:16px}
.article-body h2{font-size:23px;margin:38px 0 16px;padding-left:14px;border-left:4px solid var(--blue)}
.article-body h3{font-size:18px;margin:26px 0 12px}
.article-body p{margin-bottom:16px;color:#2a3550}
.article-body ul,.article-body ol{margin:0 0 18px 22px}
.article-body li{margin-bottom:8px;color:#2a3550}
.article-body strong{color:var(--navy)}
.article-body img{border-radius:12px;margin:20px 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin:-8px 0 20px}
.article-body blockquote{border-left:3px solid var(--blue);background:var(--soft);border-radius:0 10px 10px 0;padding:14px 18px;margin:20px 0;color:var(--navy);font-size:15px}

/* 粘性目录 */
.article-side{position:sticky;top:24px}
.toc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:0 4px 16px rgba(15,27,51,.05)}
.toc-title{font-weight:800;color:var(--navy);font-size:14px;letter-spacing:.5px;margin-bottom:12px;display:flex;align-items:center;gap:7px}
.toc ol{list-style:none;font-size:14px;line-height:1.9}
.toc a{color:var(--muted)}
.toc a:hover{color:var(--blue)}

/* FAQ */
.faq{max-width:820px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden}
.faq-q{padding:18px 22px;font-weight:700;color:var(--navy);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:14px;font-size:16px}
.faq-q::after{content:"+";font-size:24px;color:var(--blue);font-weight:400;transition:.2s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{display:none;padding:0 22px 20px;color:var(--muted);font-size:15px}
.faq-item.open .faq-a{display:block}

/* 相关卡片 */
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:30px}
.related-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;transition:.2s}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfe0f5}
.related-card h4{font-size:15.5px;margin-bottom:8px;color:var(--navy)}
.related-card p{font-size:13.5px;color:var(--muted)}

/* CTA 区 */
.cta-box{background:var(--grad);border-radius:18px;padding:40px;text-align:center;color:#fff;margin:40px 0}
.cta-box h3{color:#fff;font-size:24px;margin-bottom:10px}
.cta-box p{color:#e3f0ff;margin-bottom:22px}
.cta-box .btn{background:#fff;color:var(--navy)}

/* 页脚(深墨蓝 + logo 四色顶边) */
.footer{background:var(--ink);color:#c6d2e8;padding:52px 0 28px;margin-top:20px;border-top:4px solid transparent;border-image:linear-gradient(90deg,#4d90fe,#ffc700,#e94242,#80c342) 1}
.foot-in{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
.foot-brand p{font-size:14px;margin-top:12px;max-width:26em}
.foot-brand .brand{color:#fff;padding:0}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.foot-col a{display:block;color:#c6d2e8;font-size:14px;padding:4px 0}
.foot-col a:hover{color:#fff}
.copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:22px;text-align:center;font-size:13.5px;color:#8fa3c4}

/* 搜索/站点地图/404 */
.search-hero{background:var(--grad);color:#fff;padding:46px 0;text-align:center}
.search-hero h1{color:#fff;font-size:32px;margin-bottom:18px}
.search-box{max-width:560px;margin:0 auto;display:flex;gap:10px}
.search-input{flex:1;border:none;border-radius:999px;padding:14px 20px;font-size:15px;outline:none}
.search-input:focus{box-shadow:0 0 0 3px rgba(255,255,255,.4)}
.search-results{max-width:720px;margin:40px auto;padding:0 20px}
.search-results a{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:12px;color:var(--navy);font-weight:600}
.search-results a:hover{border-color:var(--blue)}
.search-results a small{display:block;font-weight:400;color:var(--muted);margin-top:4px}
.sitemap-list{columns:2;column-gap:44px;list-style:none}
.sitemap-list li{margin-bottom:9px;break-inside:avoid}
.sitemap-list a{color:var(--navy)}
.hero-404{padding:90px 0;text-align:center}
.hero-404 h1{font-size:88px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:8px}
.hero-404 p{color:var(--muted);margin-bottom:26px}

/* 返回顶部 */
#topBtn{position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:50%;background:var(--ink);color:#fff;border:none;font-size:20px;cursor:pointer;opacity:0;pointer-events:none;transition:.25s;box-shadow:0 8px 20px rgba(15,27,51,.35)}
#topBtn.show{opacity:1;pointer-events:auto}

/* 分享 */
.share{display:flex;align-items:center;gap:10px;margin-top:30px;padding-top:22px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}
.share a{width:36px;height:36px;border-radius:50%;background:var(--soft);color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:700}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .hero-in,.article-layout{grid-template-columns:1fr}
  .article-side{position:static;order:-1}
  .platform-grid,.related{grid-template-columns:1fr 1fr}
  .tool-panel{grid-template-columns:1fr}
  .tool-bar{flex-direction:row;flex-wrap:wrap;justify-content:center}
  .feat-list{grid-template-columns:1fr 1fr}
  .foot-in{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr;gap:24px}
  .split.rev .split-img{order:0}
}
@media(max-width:640px){
  .menu-btn{display:block}
  .nav{padding:10px 12px}
  .nav-in{width:100%;justify-content:space-between;border-radius:24px}
  .nav-links{display:none;position:absolute;top:calc(100% - 6px);left:0;right:0;background:rgba(15,27,51,.97);flex-direction:column;align-items:stretch;padding:10px;border-radius:20px;box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 16px}
  .nav-links a.nav-cta{margin-left:0;text-align:center}
  .brand span{display:none}
  .hero h1{font-size:31px}
  .hero{padding:44px 0 50px}
  .pin-wall{height:320px}
  .sticky.s1{left:16px;top:20px;width:170px}
  .sticky.s2{right:14px;top:70px;width:180px}
  .sticky.s3{bottom:22px;left:50%;width:210px}
  .feat-list,.platform-grid,.related,.foot-in{grid-template-columns:1fr}
  .article-main{padding:26px 22px}
  .article-main h1{font-size:25px}
  .sitemap-list{columns:1}
}