/* ==========================================================================
   闪连  —— 星图航线 Constellation「极光星空」主题
   浅紫白底 + 深靛夜空 + 紫罗兰→品红极光渐变;分屏 hero(左文案+右星座航线 SVG)
   ========================================================================== */

:root{
  --bg:#f7f5fc; --bg-soft:#efeafa; --bg-deep:#e3dcf4;
  --ink:#241b3a; --ink-soft:#3d3360; --muted:#6b5f8a; --faint:#9387ad;
  --violet:#7c3aed; --violet-bright:#a855f7; --fuchsia:#d946ef; --violet-deep:#6d28d9;
  --indigo:#312e81; --gold:#fbbf24; --aurora:#22d3ee;
  --deep:#150f2e;
  --line:#e3dcf1; --line-soft:#ece6f7;
  --panel:#ffffff;
  --grad:linear-gradient(120deg,#7c3aed 0%,#a855f7 50%,#d946ef 100%);
  --grad-text:linear-gradient(115deg,#6d28d9 0%,#a855f7 50%,#d946ef 100%);
  --grad-soft:linear-gradient(120deg,rgba(124,58,237,.10),rgba(217,70,239,.13));
  --mono:"Cascadia Code","Consolas","JetBrains Mono","SFMono-Regular",monospace;
  --shadow:0 1px 2px rgba(36,27,58,.05),0 12px 30px -18px rgba(36,27,58,.16);
  --shadow-lg:0 24px 60px -30px rgba(21,15,46,.36);
  --r:16px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
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:inherit;text-decoration:none}
ul,ol{padding-left:1.3em}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

/* ===== 顶部极光渐变条 ===== */
.signal-strip{height:4px;background:linear-gradient(90deg,#6d28d9,#a855f7,#d946ef,#22d3ee);position:relative;z-index:60;overflow:hidden}
.signal-strip::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.85),transparent);
  transform:translateX(-100%);animation:beam 5s ease-in-out infinite}
@keyframes beam{0%{transform:translateX(-100%)}60%,100%{transform:translateX(100%)}}

/* ===== 导航 masthead(浅色) ===== */
.masthead{position:sticky;top:0;z-index:50;background:rgba(247,245,252,.92);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.masthead .wrap{padding-top:14px;padding-bottom:10px}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding-bottom:12px}
.wordmark{display:flex;align-items:center;gap:11px;flex-shrink:0}
.wm-mark{width:34px;height:34px;border-radius:10px;border:1px solid var(--line);flex:none;display:block;
  box-shadow:0 6px 16px -6px rgba(124,58,237,.42)}
.mastfoot .wm-mark{width:28px;height:28px;border-radius:9px;border-color:rgba(255,255,255,.2)}
.wm-text{display:flex;flex-direction:column;line-height:1.15}
.wm-name{font-size:20px;font-weight:800;letter-spacing:.02em;color:var(--ink)}
.wm-sub{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--muted);margin-top:2px}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-row{display:flex;align-items:center;justify-content:center;gap:2px;border-top:1px solid var(--line-soft);padding-top:10px}
.nav-wrap{display:flex;align-items:center;gap:2px}
.nav-wrap>a{position:relative;padding:9px 14px;font-size:15px;font-weight:500;color:var(--ink-soft);border-radius:9px}
.nav-wrap>a:hover{background:var(--bg-soft);color:var(--violet)}
.nav-wrap>a.on{color:var(--violet);font-weight:700}
.nav-wrap>a.on::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--grad);border-radius:2px}
.dd{position:relative}
.dd>button{background:none;border:none;font:inherit;font-size:15px;font-weight:500;color:var(--ink-soft);padding:9px 14px;border-radius:9px;cursor:pointer;font-family:inherit}
.dd>button:hover{background:var(--bg-soft);color:var(--violet)}
.dd-menu{position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%);min-width:210px;
  background:var(--panel);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-lg);
  padding:8px;display:none;flex-direction:column;z-index:60}
.dd:hover .dd-menu{display:flex}
.dd-menu a{padding:9px 12px;border-radius:8px;font-size:14px;color:var(--ink-soft);white-space:nowrap}
.dd-menu a:hover{background:var(--bg-soft);color:var(--violet)}
.nav-search{width:38px;height:38px;border:1px solid var(--line);border-radius:11px;background:var(--panel);
  color:var(--violet);font-size:17px;cursor:pointer;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center}
.nav-search:hover{border-color:var(--violet);box-shadow:0 6px 16px -6px rgba(124,58,237,.5)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:42px;height:42px;font-size:22px;color:var(--ink);cursor:pointer;line-height:1}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;font-weight:600;
  padding:11px 20px;font-size:15px;border:1px solid transparent;cursor:pointer;transition:.18s}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px -10px rgba(124,58,237,.72)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 34px -12px rgba(109,40,217,.62)}
.btn-ghost{background:var(--panel);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--violet);color:var(--violet)}
.btn-outline{background:transparent;color:var(--violet);border-color:var(--violet)}
.btn-outline:hover{background:var(--grad-soft);color:var(--violet)}
.btn-lg{padding:14px 28px;font-size:16px;border-radius:14px}
.btn-sm{padding:9px 16px;font-size:14px}

/* ===== 分屏 hero(深靛夜空 + 极光渐变 + 左文案右星座) ===== */
.hero{position:relative;overflow:hidden;color:#fff;background:
  radial-gradient(1100px 620px at 12% -10%,rgba(124,58,237,.38) 0%,transparent 58%),
  radial-gradient(900px 560px at 88% 8%,rgba(217,70,239,.28) 0%,transparent 56%),
  linear-gradient(160deg,#150f2e 0%,#241543 52%,#150f2e 100%)}
.hero::after{content:"";position:absolute;inset:0;background:
  linear-gradient(180deg,transparent 30%,rgba(21,15,46,.35)),pointer-events:none}
.hero-blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.4;pointer-events:none}
.hero-blob.b1{width:440px;height:440px;left:-110px;top:20px;background:radial-gradient(circle,#a855f7,transparent 70%);animation:float 17s ease-in-out infinite}
.hero-blob.b2{width:380px;height:380px;right:-90px;bottom:-50px;background:radial-gradient(circle,#22d3ee,transparent 70%);animation:float 21s ease-in-out infinite reverse}
.hero .wrap{position:relative;z-index:3;padding:64px 24px 60px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.hero-copy{text-align:left}
.hero-kicker{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:12.5px;
  letter-spacing:.13em;color:#e9d5ff;background:rgba(168,85,247,.2);border:1px solid rgba(217,70,239,.42);
  padding:6px 14px;border-radius:999px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.hero-kicker .dot{width:8px;height:8px;border-radius:50%;background:var(--grad);box-shadow:0 0 12px rgba(217,70,239,.9);animation:pulse 2s ease-in-out infinite}
.hero-title{font-size:clamp(31px,4.6vw,52px);font-weight:800;line-height:1.15;letter-spacing:-.02em;margin:22px 0 18px;color:#fff}
.hero-title .hl{background:linear-gradient(115deg,#fbbf24,#d946ef 45%,#a855f7 75%,#22d3ee);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{color:rgba(255,255,255,.76);font-size:16.5px;max-width:540px}
.hero-cta{display:flex;gap:14px;margin:28px 0 24px;flex-wrap:wrap}
.hero-badge-row{display:flex;gap:10px;flex-wrap:wrap}
.hero-badge{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12.5px;
  letter-spacing:.03em;color:#e9d5ff;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  padding:7px 15px;border-radius:999px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.hero-badge b{color:#e9d5ff;font-weight:700}
.hero-visual{position:relative;display:flex;align-items:center;justify-content:center}
.hero-visual .constellation{width:100%;height:auto;filter:drop-shadow(0 0 42px rgba(168,85,247,.35))}
.hero .btn-ghost{background:rgba(255,255,255,.1);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);color:#fff;border-color:rgba(255,255,255,.25)}
.hero .btn-ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.18)}
@keyframes float{0%,100%{transform:translate(0,0)}50%{transform:translate(28px,-28px)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
@keyframes twinkle{0%,100%{opacity:.35}50%{opacity:1}}

/* ===== 数据带 marquee ===== */
.marquee{background:var(--deep);border-top:1px solid #2a1d52;border-bottom:1px solid #2a1d52;overflow:hidden;position:relative}
.marquee-track{display:flex;width:max-content;animation:marquee 36s linear infinite;padding:14px 0}
.marquee:hover .marquee-track{animation-play-state:paused}
.marquee-item{display:inline-flex;align-items:center;gap:14px;padding:0 26px;font-family:var(--mono);
  font-size:12.5px;letter-spacing:.14em;color:#b9a8e0;white-space:nowrap}
.marquee-item::before{content:"✦";color:var(--fuchsia);font-size:11px}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ===== 横向时间轴 timeline ===== */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;max-width:1000px;margin:0 auto}
.timeline::before{content:"";position:absolute;left:12%;right:12%;top:26px;height:2px;
  background:linear-gradient(90deg,var(--violet),var(--fuchsia),var(--aurora));opacity:.35}
.tl-item{position:relative;text-align:center;padding:0 14px}
.tl-dot{width:52px;height:52px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;font-size:20px;
  display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-family:var(--mono);
  position:relative;z-index:2;box-shadow:0 10px 22px -8px rgba(124,58,237,.55)}
.tl-item h3{font-size:17px;font-weight:700;margin-bottom:6px;color:var(--ink)}
.tl-item p{font-size:14px;color:var(--muted)}

/* ===== SVG 招牌 ===== */
.constellation,.orbit,.aurora{width:100%;height:auto;display:block}

/* ===== section / head / kicker ===== */
.section{padding:64px 0}
.section.alt{background:linear-gradient(180deg,var(--bg-soft) 0%,var(--bg) 100%);
  border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.sec-head{text-align:center;max-width:680px;margin:0 auto 36px}
.sec-head.left{text-align:left;margin-left:0}
.sec-head h2{font-size:30px;font-weight:800;letter-spacing:-.01em;margin:8px 0 10px;color:var(--ink)}
.sec-head p{color:var(--muted);font-size:16px}
.kicker{display:inline-block;font-family:var(--mono);font-size:11.5px;letter-spacing:.18em;color:var(--violet);
  text-transform:uppercase;background:rgba(124,58,237,.08);border:1px solid rgba(124,58,237,.22);padding:4px 11px;border-radius:7px}

/* ===== 虚化背景区块 bg-panel(首页中部,图虚化进背景) ===== */
.bg-panel{position:relative;overflow:hidden;color:#fff;padding:78px 0;border-top:1px solid rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.06)}
.bg-panel::before{content:"";position:absolute;inset:-70px;background-size:cover;background-position:center;
  filter:blur(18px) brightness(.42) saturate(1.15);transform:scale(1.1)}
.bg-panel::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(21,15,46,.82) 0%,rgba(21,15,46,.62) 100%)}
.bg-panel.bg-stars::before{background-image:url("../images/starry-night.jpg")}
.bg-panel.bg-aurora::before{background-image:url("../images/aurora-sky.jpg")}
.bg-panel .wrap{position:relative;z-index:2}
.bg-panel .kicker{color:#fbbf24;background:rgba(251,191,36,.12);border-color:rgba(251,191,36,.3)}
.bg-panel h2{color:#fff}
.bg-panel .sec-head p{color:rgba(255,255,255,.72)}
.bg-panel .split h2{color:#fff}
.bg-panel .split p,.bg-panel .split ul{color:rgba(255,255,255,.78)}
.bg-panel .split ul li::marker{color:#fbbf24}

/* ===== rel-grid / rel-card ===== */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.rel-grid.single{grid-template-columns:repeat(4,1fr)}
.rel-card{display:block;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px;
  box-shadow:var(--shadow);transition:.18s;position:relative;overflow:hidden}
.rel-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--grad);opacity:0;transition:.18s}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(124,58,237,.4)}
.rel-card:hover::before{opacity:1}
.rel-card .tag{display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--violet);
  background:rgba(124,58,237,.08);border:1px solid rgba(124,58,237,.2);padding:3px 9px;border-radius:6px;margin-bottom:12px}
.rel-card h4{font-size:17px;font-weight:700;margin-bottom:7px;color:var(--ink)}
.rel-card p{font-size:14px;color:var(--muted)}

/* ===== bento ===== */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.bento-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:var(--shadow);
  transition:.18s;position:relative;overflow:hidden}
.bento-card::after{content:"";position:absolute;right:-34px;top:-34px;width:96px;height:96px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,58,237,.12),transparent 70%)}
.bento-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(124,58,237,.4)}
.bento-card .ic{font-size:30px;margin-bottom:14px;display:inline-block}
.bento-card h3{font-size:18px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.bento-card p{font-size:14.5px;color:var(--muted)}

/* ===== 硬数据统计卡 ===== */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px 22px;box-shadow:var(--shadow);
  text-align:center;position:relative;overflow:hidden;transition:.18s}
.stat::after{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:var(--grad);opacity:.8}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.stat-num{font-family:var(--mono);font-size:34px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.1}
.stat-label{font-size:15px;font-weight:700;color:var(--ink);margin-top:6px;display:block}
.stat p{font-size:13.5px;color:var(--muted);margin-top:8px;line-height:1.5}

/* ===== 横向滚动场景卡 h-scroll ===== */
.h-scroll{display:flex;gap:18px;overflow-x:auto;padding:6px 2px 18px;scroll-snap-type:x mandatory;
  scrollbar-width:thin;scrollbar-color:var(--violet) var(--line)}
.h-scroll::-webkit-scrollbar{height:8px}
.h-scroll::-webkit-scrollbar-thumb{background:var(--grad);border-radius:4px}
.h-scroll::-webkit-scrollbar-track{background:var(--line-soft);border-radius:4px}
.h-card{flex:0 0 300px;scroll-snap-align:start;position:relative;border-radius:18px;overflow:hidden;
  box-shadow:var(--shadow);border:1px solid var(--line);background:var(--panel);transition:.2s}
.h-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.h-card img{aspect-ratio:16/10;object-fit:cover;width:100%}
.h-cap{padding:16px 18px 18px}
.h-cap .tag{display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--violet);
  margin-bottom:8px}
.h-cap h4{font-size:17px;font-weight:700;margin-bottom:4px;color:var(--ink)}
.h-cap p{font-size:13.5px;color:var(--muted)}

/* ===== steps(竖排玻璃编号步骤) ===== */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:940px;margin:0 auto}
.step{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow);position:relative}
.step .n{width:42px;height:42px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;font-size:17px;
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-family:var(--mono)}
.step h3{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.step p{font-size:14.5px;color:var(--muted)}
.step .b{line-height:1.6}

/* ===== 教程 hub 分组 ===== */
.tut-group{margin-bottom:46px}
.tut-group:last-child{margin-bottom:0}
.tut-group>h3{font-size:20px;font-weight:800;margin-bottom:18px;color:var(--ink);
  padding-left:14px;border-left:4px solid var(--violet)}

/* ===== 表格 ===== */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);background:var(--panel)}
table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:520px}
thead th{background:var(--bg-deep);color:var(--violet-deep);text-align:left;padding:13px 16px;font-weight:600;
  white-space:nowrap;font-family:var(--mono);letter-spacing:.04em}
thead th:first-child{border-radius:15px 0 0 0}
thead th:last-child{border-radius:0 15px 0 0}
tbody td{padding:13px 16px;border-top:1px solid var(--line-soft);color:var(--ink)}
tbody tr:nth-child(even){background:rgba(124,58,237,.03)}
tbody tr:hover{background:rgba(124,58,237,.06)}

/* ===== 提示 / 警示 / 引用 ===== */
.tip,.callout{border-radius:14px;padding:15px 18px;margin:20px 0;font-size:15px;position:relative;padding-left:48px}
.tip{background:rgba(168,85,247,.12);border:1px solid rgba(168,85,247,.35);color:#6d28d9}
.tip::before{content:"ⓘ";position:absolute;left:16px;top:14px;font-weight:700;color:var(--violet-bright);font-size:18px}
.callout{background:rgba(124,58,237,.08);border:1px solid rgba(124,58,237,.28);color:#5b21b6}
.callout::before{content:"!";position:absolute;left:19px;top:13px;font-weight:800;color:var(--violet);font-size:18px}
blockquote{border-left:3px solid var(--violet);background:var(--bg-soft);padding:14px 20px;border-radius:0 14px 14px 0;margin:20px 0;color:var(--ink);font-style:italic}

/* ===== FAQ ===== */
.faq-group{margin-bottom:18px}
.faq-group h2{font-size:20px;font-weight:700;margin-bottom:14px;color:var(--violet)}
.faq-group details{background:var(--panel);border:1px solid var(--line);border-radius:14px;margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden}
.faq-group summary{cursor:pointer;padding:16px 20px;font-weight:600;font-size:15.5px;list-style:none;
  display:flex;justify-content:space-between;align-items:center;color:var(--ink)}
.faq-group summary::-webkit-details-marker{display:none}
.faq-group summary::after{content:"＋";font-family:var(--mono);color:var(--violet);font-weight:700;font-size:18px}
.faq-group details[open] summary::after{content:"－"}
.faq-a{padding:0 20px 18px;color:var(--muted);font-size:14.5px}

/* ===== CTA ===== */
.cta-band{background:var(--grad);border-radius:22px;padding:54px 42px;text-align:center;color:#fff;
  position:relative;overflow:hidden;box-shadow:var(--shadow-lg)}
.cta-band::before{content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.28) 1px,transparent 1px);background-size:26px 26px;opacity:.4}
.cta-band h2{font-size:30px;font-weight:800;margin-bottom:10px;position:relative}
.cta-band p{font-size:16px;opacity:.92;margin-bottom:24px;position:relative}
.cta-band .btn-ghost{position:relative;background:#fff;color:var(--violet);border:0;font-weight:700}
.cta-band .btn-ghost:hover{background:#f6efff;color:var(--violet-deep)}

/* ===== 页脚 mastfoot(深靛夜空) ===== */
.mastfoot{background:var(--deep);color:#a99bd0;border-top:1px solid #2a1d52;position:relative;overflow:hidden}
.mastfoot::before{content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(168,85,247,.09) 1px,transparent 1px);background-size:28px 28px;pointer-events:none}
.mastfoot .wrap{position:relative;padding:54px 24px 0}
.mf-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;padding-bottom:38px}
.mf-brand p{font-size:14px;margin-top:14px;max-width:280px;line-height:1.8}
.mf-brand .wm-name{color:#fff}
.mf-brand .wm-sub{color:#8f7cc0}
.mf-col h4{color:#fff;font-size:13px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:16px;font-family:var(--mono)}
.mf-col a{display:block;font-size:14px;padding:5px 0;color:#a99bd0}
.mf-col a:hover{color:#fbbf24}
.foot-line{border-top:1px solid #2a1d52;padding:20px 0;text-align:center;font-family:var(--mono);font-size:12.5px;letter-spacing:.05em;color:#6a5b96}

/* ===== 面包屑 ===== */
.breadcrumb{font-size:13.5px;color:var(--muted);margin-bottom:16px}
.breadcrumb a{color:var(--violet)}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb .sep{margin:0 8px;color:#cfc4e8}

/* ===== page-hero ===== */
.page-hero{background:
  radial-gradient(760px 420px at 15% -20%,rgba(124,58,237,.13) 0%,transparent 60%),
  radial-gradient(700px 400px at 90% -10%,rgba(217,70,239,.12) 0%,transparent 60%),
  var(--bg);border-bottom:1px solid var(--line-soft);padding:50px 0 46px;position:relative;overflow:hidden}
.page-hero .wrap{position:relative}
.page-hero h1{font-size:36px;font-weight:800;letter-spacing:-.01em;margin-bottom:12px;color:var(--ink)}
.page-hero p{color:var(--muted);font-size:16.5px;max-width:720px}

/* ===== 左右图文 split ===== */
.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.split.rev>div:first-child{order:2}
.split h2{font-size:26px;font-weight:800;margin-bottom:14px;color:var(--ink)}
.split p{color:var(--muted);margin-bottom:14px}
.split ul{color:var(--muted);margin-bottom:16px}
.split ul li{margin-bottom:8px}
.split .img{border-radius:18px;overflow:hidden;box-shadow:var(--shadow-lg);position:relative}
.split .img img{aspect-ratio:4/3;object-fit:cover;width:100%}

/* ===== 文章页(双栏 grid 挂在 .wrap 上,不是 section) ===== */
.article-hero{background:
  radial-gradient(760px 420px at 15% -20%,rgba(124,58,237,.12) 0%,transparent 60%),
  radial-gradient(700px 400px at 90% -10%,rgba(217,70,239,.11) 0%,transparent 60%),
  var(--bg);border-bottom:1px solid var(--line-soft);padding:44px 0 40px;position:relative;overflow:hidden}
.article-hero .wrap{position:relative}
.article-hero h1{font-size:34px;font-weight:800;letter-spacing:-.01em;margin-bottom:12px;line-height:1.3;color:var(--ink)}
.article-hero p{color:var(--muted);max-width:720px}
.article-meta{display:flex;gap:20px;margin-top:16px;font-size:13px;color:var(--muted);font-family:var(--mono)}
.article-hero .wrap.ah-grid{display:grid;grid-template-columns:1fr 360px;gap:40px;align-items:center}
.ah-text{min-width:0}
.ah-fig{margin:0;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);aspect-ratio:16/11;background:var(--panel)}
.ah-fig img{width:100%;height:100%;object-fit:cover;display:block}
@media (max-width:820px){.article-hero .wrap.ah-grid{grid-template-columns:1fr}.ah-fig{max-width:440px}}
.article-body{padding:44px 0 70px}
.article-body .wrap{display:grid;grid-template-columns:240px 1fr;gap:44px;align-items:start}
.toc{position:sticky;top:90px;align-self:start;background:var(--panel);border:1px solid var(--line);border-radius:16px;
  padding:18px;box-shadow:var(--shadow)}
.toc h4{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--violet);text-transform:uppercase;margin-bottom:12px}
.toc a{display:block;font-size:14px;color:var(--muted);padding:6px 0;border-left:2px solid transparent;padding-left:12px}
.toc a:hover{color:var(--violet);border-left-color:var(--violet)}
.prose{font-size:16.5px;line-height:1.9;color:var(--ink-soft)}
.prose h2{font-size:24px;font-weight:800;margin:36px 0 14px;padding-top:14px;color:var(--violet-deep)}
.prose h3{font-size:19px;font-weight:700;margin:24px 0 10px;color:var(--ink)}
.prose .table-wrap{margin:24px 0}
.prose p{margin-bottom:16px}
.prose ul,.prose ol{margin-bottom:16px}
.prose li{margin-bottom:8px}
.prose figure{margin:26px 0}
.prose figure img{border-radius:16px;border:1px solid var(--line);box-shadow:var(--shadow)}
.prose figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
.prose a{color:var(--violet);border-bottom:1px solid rgba(124,58,237,.3)}
.prose a:hover{color:var(--violet-deep)}

/* ===== 分享 ===== */
.share{display:flex;gap:10px;margin-top:36px;padding-top:22px;border-top:1px solid var(--line);flex-wrap:wrap}
.share a{font-size:13px;font-weight:600;color:var(--violet);border:1px solid var(--line);border-radius:10px;
  padding:8px 14px;background:var(--panel);transition:.15s}
.share a:hover{border-color:var(--violet);background:var(--grad-soft)}

/* ===== center-hero / search-box / sitemap ===== */
.center-hero{min-height:55vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:60px 24px;position:relative}
.center-hero h1{font-size:72px;font-weight:800;background:var(--grad-text);-webkit-background-clip:text;
  background-clip:text;color:transparent;line-height:1}
.center-hero p{color:var(--muted);margin:18px 0 26px}
.search-box{display:flex;gap:10px;max-width:520px;margin:0 auto}
.search-box input{flex:1;padding:12px 16px;border:1px solid var(--line);border-radius:12px;font-size:15px;
  font-family:inherit;background:var(--panel);color:var(--ink)}
.search-box input:focus{outline:none;border-color:var(--violet);box-shadow:0 0 0 3px rgba(124,58,237,.15)}
.sitemap-list h2{font-size:20px;font-weight:700;margin:30px 0 12px;color:var(--violet);border-bottom:2px solid var(--line);padding-bottom:8px}
.sitemap-list>div{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.sitemap-list a{font-size:14px;color:var(--ink-soft);padding:4px 0;display:block}
.sitemap-list a:hover{color:var(--violet);text-decoration:underline}

/* ===== 返回顶部 ===== */
.backtop{position:fixed;right:22px;bottom:24px;width:46px;height:46px;border-radius:14px;background:var(--grad);
  color:#fff;font-size:20px;border:0;cursor:pointer;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;
  transform:translateY(10px);transition:.25s;z-index:90}
.backtop.show{opacity:1;visibility:visible;transform:translateY(0)}
.backtop:hover{transform:translateY(-2px)}

/* ===== 滚动渐显 ===== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media (max-width:980px){
  .timeline{grid-template-columns:1fr 1fr;gap:26px}
  .timeline::before{display:none}
  .rel-grid,.bento{grid-template-columns:repeat(2,1fr)}
  .rel-grid.single{grid-template-columns:repeat(2,1fr)}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr;max-width:460px}
  .mf-grid{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr;gap:28px}
  .split.rev>div:first-child{order:0}
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .hero-visual{order:-1;max-width:520px;margin:0 auto}
  .article-body .wrap{grid-template-columns:1fr}
  .toc{position:static;display:none}
  .sitemap-list>div{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:680px){
  .nav-row{justify-content:space-between;flex-wrap:wrap}
  .nav-wrap>a,.nav-wrap .dd{display:none}
  .nav-wrap.open>a,.nav-wrap.open .dd{display:block}
  .nav-wrap{flex-direction:column;align-items:stretch;width:100%}
  .nav-wrap.open{display:flex}
  .nav-wrap.open .dd-menu{position:static;display:flex;box-shadow:none;border:0;padding:0 0 0 12px;transform:none;background:transparent}
  .nav-toggle{display:block;margin-left:auto}
  .timeline{grid-template-columns:1fr}
  .rel-grid,.bento,.rel-grid.single{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr}
  .mf-grid{grid-template-columns:1fr}
  .sitemap-list>div{grid-template-columns:1fr}
  .hero-cta .btn{width:100%}
  .cta-band{padding:40px 22px}
  .cta-band h2{font-size:24px}
}

/* ===== 顶部状态条 topbar ===== */
.topbar{position:relative;z-index:60;background:linear-gradient(90deg,#150f2e,#6d28d9 55%,#a855f7);color:#fff;font-size:13px;text-align:center;padding:7px 16px;letter-spacing:.4px;font-weight:500}
.topbar .tb-sep{opacity:.5;margin:0 9px}

/* ===== 线条 stroke 图标(替代 emoji) ===== */
.lic{width:24px;height:24px;display:inline-block;flex:none;vertical-align:middle;stroke:currentColor}
.bento-card .ic{color:var(--violet)}
.bento-card .ic .lic{width:30px;height:30px}
.hero-badge .lic{width:15px;height:15px;color:#fbbf24}
.rel-card .p-ic{color:var(--violet);margin-bottom:12px}
.rel-card .p-ic .lic{width:28px;height:28px}
.btn .lic{width:17px;height:17px}