/* ============================================================
   CoinVair · 设计系统  (琥珀飞行甲板 · 专业数据站)
   ============================================================ */
:root{
  --ink:#050912; --ink-2:#0B1220; --ink-3:#131B2E; --ink-4:#1B2740;
  --gold:#F0B90B; --gold-2:#FCD535; --gold-3:#F5A524;
  --gold-soft:rgba(240,185,11,.09); --gold-line:rgba(240,185,11,.28); --gold-glow:rgba(240,185,11,.22);

  --text:#0F172A; --text-2:#334155; --muted:#64748B; --faint:#94A3B8;
  --line-l:#E6EAF1; --line-l2:#D3DAE6;
  --bg:#F7F9FC; --bg-2:#EEF2F8; --card:#FFFFFF;

  --white:#F5F7FB; --w-72:rgba(255,255,255,.72); --w-50:rgba(255,255,255,.5); --w-35:rgba(255,255,255,.35);
  --line:rgba(255,255,255,.08); --line-2:rgba(255,255,255,.14);
  --up:#10B981; --down:#F43F5E; --warn:#F59E0B;

  --sh-sm:0 2px 8px rgba(11,18,32,.06),0 1px 3px rgba(11,18,32,.04);
  --sh-md:0 10px 28px rgba(11,18,32,.10),0 3px 8px rgba(11,18,32,.05);
  --sh-lg:0 28px 60px rgba(11,18,32,.14),0 10px 24px rgba(11,18,32,.08);

  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,"Helvetica Neue",Arial,sans-serif;
  --mono:"JetBrains Mono","SF Mono",Menlo,Consolas,monospace;
  --max:1200px; --max-article:760px; --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.7;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-feature-settings:'tnum' 1;}
a{color:var(--gold-3);text-decoration:none;transition:color .15s var(--ease);}
a:hover{color:var(--text);}
img,svg{max-width:100%;height:auto;display:block;}
h1,h2,h3,h4{color:var(--text);font-weight:800;line-height:1.25;letter-spacing:-.015em;}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px;}
.wrap-a{max-width:var(--max-article);margin:0 auto;padding:0 24px;}
.bnc{display:inline-block;vertical-align:-2px;}
.bnc path{fill:currentColor;}
.dark{color:var(--white);}
.only-mobile{display:none;}

/* ===== ticker ===== */
.ticker{background:#03060C;border-bottom:1px solid var(--line);overflow:hidden;}
.tk-in{display:flex;gap:30px;align-items:center;height:34px;padding:0 24px;white-space:nowrap;font-family:var(--mono);font-size:12px;color:var(--w-50);overflow:hidden;}
.tk{display:inline-flex;gap:7px;align-items:center;flex:0 0 auto;}
.tk .l{color:var(--w-35);} .tk .v{color:#fff;font-weight:500;} .tk .up{color:var(--up);} .tk .down{color:var(--down);}
.tk .dot{width:6px;height:6px;border-radius:50%;background:var(--gold);box-shadow:0 0 8px var(--gold-glow);}

/* ===== nav ===== */
nav{position:sticky;top:0;z-index:50;background:rgba(5,9,18,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px;}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.01em;color:#fff;}
.brand .m{width:27px;height:27px;flex:0 0 auto;}
.brand b{color:var(--gold);}
.nav-links{display:flex;gap:6px;align-items:center;font-size:14.5px;color:var(--w-72);font-weight:500;}
.nav-item{position:relative;}
.nav-item>a{display:inline-flex;align-items:center;gap:5px;padding:8px 12px;border-radius:8px;color:var(--w-72);transition:.15s;}
.nav-item.has-dd>a::after{content:'▾';font-size:10px;color:var(--w-35);transition:.15s;}
.nav-item:hover>a{color:#fff;background:rgba(255,255,255,.04);}
.nav-item.has-dd:hover>a::after{transform:rotate(180deg);color:var(--gold);}
.dd{position:absolute;top:calc(100% + 12px);left:50%;transform:translateX(-50%) translateY(8px);min-width:232px;background:#0A1120;border:1px solid var(--line-2);border-radius:13px;padding:8px;box-shadow:0 28px 56px rgba(0,0,0,.6),inset 0 1px 0 rgba(255,255,255,.05);opacity:0;visibility:hidden;transition:.18s var(--ease);z-index:60;}
.dd::before{content:'';position:absolute;top:-14px;left:0;right:0;height:14px;}
.nav-item:hover .dd{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);}
.dd a{display:flex;align-items:flex-start;gap:10px;padding:9px 11px;border-radius:9px;color:var(--w-72);line-height:1.3;}
.dd a:hover{background:var(--gold-soft);color:#fff;}
.dd a .di{width:6px;height:6px;border-radius:50%;background:var(--gold);flex:0 0 auto;margin-top:6px;box-shadow:0 0 7px var(--gold-glow);}
.dd a b{font-weight:600;font-size:14px;display:block;}
.dd a small{color:var(--w-35);font-size:11.5px;}
.lang{color:var(--w-35);font-size:13px;position:relative;cursor:default;margin-left:10px;}
.lang .dd{min-width:150px;}
.lang .dd a b{font-size:13.5px;}
.nav-cta{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(180deg,var(--gold-2),var(--gold));color:#1A1200;font-weight:700;font-size:14px;padding:9px 16px;border-radius:9px;box-shadow:0 6px 18px var(--gold-glow);white-space:nowrap;}
.nav-cta .bnc{color:#181200;}
.nav-burger{display:none;background:none;border:1px solid var(--line-2);border-radius:8px;color:#fff;width:40px;height:40px;font-size:18px;cursor:pointer;}

/* ===== buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:700;font-size:15.5px;border-radius:11px;padding:13px 22px;min-height:44px;transition:.16s var(--ease);cursor:pointer;border:none;}
.btn-gold{background:linear-gradient(180deg,var(--gold-2),var(--gold));color:#1A1200;box-shadow:0 10px 26px var(--gold-glow),inset 0 1px 0 rgba(255,255,255,.35);}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(240,185,11,.45),inset 0 1px 0 rgba(255,255,255,.35);color:#1A1200;}
.btn-gold .bnc{color:#181200;}
.btn-ghost-d{background:transparent;color:var(--white);border:1px solid var(--line-2);}
.btn-ghost-d:hover{border-color:var(--gold-line);color:var(--gold-2);}
.btn-ghost{background:var(--card);color:var(--text);border:1px solid var(--line-l2);}
.btn-ghost:hover{border-color:var(--gold);color:var(--text);}

/* ===== hero ===== */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#050912 0%,#0A111F 55%,#0E1728 100%);border-bottom:1px solid var(--line);box-shadow:inset 0 1px 0 var(--gold-line);padding:40px 0 30px;color:var(--white);}
.hero-bg{position:absolute;inset:0;pointer-events:none;z-index:0;}
.hero-bg::after{content:'';position:absolute;inset:0;background:
  linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px) 0 0/64px 64px,
  linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px) 0 0/64px 64px,
  radial-gradient(900px 520px at 82% 20%,rgba(240,185,11,.16),transparent 62%),
  radial-gradient(680px 420px at 8% 92%,rgba(245,165,36,.10),transparent 60%),
  radial-gradient(130% 90% at 50% 116%,rgba(5,9,18,.75),transparent 70%);}
.net{position:absolute;top:0;right:0;width:60%;height:100%;z-index:1;opacity:.9;}
.hero-grid{position:relative;z-index:3;display:grid;grid-template-columns:1.06fr .94fr;gap:40px;align-items:center;}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:2px;text-transform:uppercase;color:var(--gold-2);font-weight:800;padding:7px 14px;border-radius:999px;background:var(--gold-soft);border:1px solid var(--gold-line);margin-bottom:16px;box-shadow:0 0 22px rgba(240,185,11,.12);}
.eyebrow .d{width:7px;height:7px;border-radius:50%;background:var(--gold-2);box-shadow:0 0 11px var(--gold-2);}
.hero h1{font-size:clamp(28px,3.6vw,44px);font-weight:800;line-height:1.12;letter-spacing:-.022em;margin:0 0 20px;color:#fff;}
.hero h1 .hl{color:var(--gold);}

/* 登机牌转化卡 */
.pass{position:relative;background:linear-gradient(160deg,rgba(27,39,64,.72),rgba(11,18,32,.55));border:1px solid var(--line-2);border-radius:16px;padding:18px 20px;max-width:460px;box-shadow:0 24px 60px rgba(0,0,0,.42),inset 0 1px 0 rgba(255,255,255,.05);backdrop-filter:blur(6px);}
.pass::before{content:'';position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:3px;background:linear-gradient(var(--gold-2),transparent);box-shadow:0 0 14px var(--gold-glow);}
.pass-brand{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:0 0 12px 12px;margin-bottom:13px;border-bottom:1px solid var(--line);}
.blk{display:inline-flex;align-items:center;gap:10px;}
.blk .bnc{color:var(--gold);filter:drop-shadow(0 0 10px var(--gold-glow));}
.bword{font-weight:800;font-size:21px;letter-spacing:.06em;color:var(--gold);line-height:1;}
.pb-sep{display:inline-flex;align-items:center;gap:6px;font-size:11px;color:var(--w-50);font-family:var(--mono);}
.pb-sep::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--up);box-shadow:0 0 8px rgba(16,185,129,.6);}
.pass-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;padding-left:12px;}
.codebox{display:flex;align-items:center;gap:10px;}
.codebox .cl{display:block;font-size:11px;color:var(--w-35);font-family:var(--mono);text-transform:uppercase;letter-spacing:.06em;margin-bottom:2px;}
.codebox .cv{font-family:var(--mono);font-weight:700;font-size:25px;color:var(--gold);letter-spacing:.05em;line-height:1;}
.cp{border:1px solid var(--line-2);background:var(--ink-4);color:var(--w-72);font-size:11px;font-family:var(--mono);padding:5px 10px;border-radius:7px;cursor:pointer;align-self:flex-end;}
.cp:hover{color:var(--gold);border-color:var(--gold);}
.cp.done{color:var(--up);border-color:var(--up);}
.pass .btn-gold{width:calc(100% - 12px);margin-left:12px;font-size:16px;padding:14px 22px;}
.benefit{padding-left:12px;font-size:13.5px;color:var(--w-72);margin:11px 0 0;}
.benefit b{color:#fff;} .benefit .st{color:var(--gold);}
.disc{padding-left:12px;font-size:11px;color:var(--w-35);margin-top:6px;line-height:1.5;max-width:44ch;}
.disc a{color:var(--w-50);text-decoration:underline;}

/* 4步 chips */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.chip{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--w-72);background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:999px;padding:7px 13px;}
.chip .n{font-family:var(--mono);font-size:11px;color:var(--gold);font-weight:700;}
.chip.on{border-color:var(--gold-line);background:var(--gold-soft);color:#fff;}
.chip:hover{border-color:var(--gold-line);color:#fff;}

/* 减半倒计时 + 周期图 卡 */
.cyclecard{position:relative;z-index:3;background:linear-gradient(160deg,rgba(19,27,46,.85),rgba(9,15,27,.72));border:1px solid var(--gold-line);border-radius:18px;padding:22px 22px 18px;backdrop-filter:blur(16px) saturate(140%);box-shadow:0 30px 72px rgba(0,0,0,.55),0 0 30px rgba(240,185,11,.08),inset 0 1px 0 rgba(255,255,255,.05);}
.cc-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;}
.cc-head .t{display:flex;align-items:center;gap:9px;font-size:13px;font-weight:700;color:#fff;letter-spacing:.02em;}
.cc-head .t .rl{width:8px;height:8px;border-radius:50%;background:var(--gold);box-shadow:0 0 10px var(--gold-glow);animation:pulse 2s ease-in-out infinite;}
.cc-head .r{font-family:var(--mono);font-size:10.5px;color:var(--w-35);letter-spacing:.08em;text-transform:uppercase;}
.count{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;}
.count .days{font-family:var(--mono);font-weight:800;font-size:clamp(54px,6.8vw,78px);line-height:.86;letter-spacing:-.045em;background:linear-gradient(180deg,#FEF3C7 0%,#FCD535 38%,#F0B90B 78%,#b88a06 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;filter:drop-shadow(0 6px 22px rgba(252,213,53,.3));}
.count .u{font-size:21px;color:var(--w-50);font-weight:600;margin-left:2px;}
.count .hms{font-family:var(--mono);font-weight:700;font-size:21px;color:#fff;line-height:1.1;}
.count .hms small{display:block;font-size:10px;color:var(--w-35);letter-spacing:.12em;text-transform:uppercase;margin-top:4px;font-weight:400;}
.cyc-sub{font-size:12px;color:var(--w-50);margin:8px 0 16px;}
.cyc-sub b{color:var(--gold-2);font-weight:600;}
.road-meta{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10.5px;color:var(--w-35);margin-bottom:4px;}
.road-meta b{color:var(--gold-2);font-weight:600;}
.cycle-chart{position:relative;}
.cycle-chart svg{display:block;width:100%;height:auto;}
.cycle-now{position:absolute;top:6px;bottom:20px;width:0;border-left:2px dashed rgba(255,255,255,.6);z-index:3;pointer-events:none;transition:left .6s var(--ease);}
.cycle-now .pin{position:absolute;top:-6px;left:50%;transform:translateX(-50%);background:#fff;color:#0B1220;font-family:var(--mono);font-size:10px;font-weight:700;padding:2px 8px;border-radius:6px;white-space:nowrap;box-shadow:0 6px 14px rgba(0,0,0,.5);}
.cycle-now .pin::after{content:'';position:absolute;bottom:-4px;left:50%;transform:translateX(-50%);border:4px solid transparent;border-top-color:#fff;}
.cycle-now .foot{position:absolute;bottom:-5px;left:50%;transform:translate(-50%,50%);width:10px;height:10px;border-radius:50%;background:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.22),0 0 12px rgba(255,255,255,.8);}
.cycle-phases{display:flex;margin-top:7px;font-size:10px;color:var(--w-50);text-align:center;}
.cycle-phases div{padding:0 2px;}
.cycle-phases b{display:block;font-weight:600;font-size:11.5px;margin-bottom:1px;}
.cycle-phases .p1 b{color:#34D399;} .cycle-phases .p2 b{color:var(--gold-2);}
.cycle-phases .p3 b{color:#FB7185;} .cycle-phases .p4 b{color:#93A4C8;}
.cyc-note{font-size:11px;color:var(--w-35);margin:12px 0 0;line-height:1.5;border-top:1px solid var(--line);padding-top:11px;}
.cyc-note b{color:var(--gold-2);}
.mini{display:flex;gap:8px;margin-top:12px;}
.mini .m{flex:1;background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:9px;padding:8px 10px;}
.mini .m .l{font-size:9.5px;color:var(--w-35);text-transform:uppercase;letter-spacing:.05em;display:flex;align-items:center;gap:5px;}
.mini .m .l::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--up);box-shadow:0 0 6px rgba(16,185,129,.6);}
.mini .m.g .l::before{background:var(--gold);box-shadow:0 0 6px var(--gold-glow);}
.mini .m .v{font-family:var(--mono);font-size:15px;font-weight:700;color:#fff;margin-top:3px;}
.mini .m .v small{font-size:11px;font-weight:400;} .mini .m .v .up{color:var(--up);} .mini .m .v .down{color:var(--down);}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.4;}}

/* ===== 底部金色转化条 ===== */
.ribbon{position:relative;background:linear-gradient(100deg,var(--gold) 0%,var(--gold-2) 55%,var(--gold-3) 100%);overflow:hidden;}
.ribbon::before{content:'';position:absolute;inset:0;background:repeating-linear-gradient(-45deg,rgba(0,0,0,.05) 0 2px,transparent 2px 16px);pointer-events:none;}
.rb-in{position:relative;display:flex;align-items:center;gap:20px;flex-wrap:wrap;padding:17px 0;}
.rb-tag{display:inline-flex;align-items:center;gap:8px;background:#1A1200;color:var(--gold-2);font-weight:700;font-size:12.5px;padding:7px 13px;border-radius:999px;font-family:var(--mono);}
.rb-tag .bnc{color:var(--gold);}
.rb-text{flex:1;min-width:290px;color:#1A1200;font-size:18px;font-weight:600;}
.rb-text code{font-family:var(--mono);font-weight:800;background:#1A1200;color:var(--gold-2);padding:2px 10px;border-radius:6px;letter-spacing:.05em;}
.rb-text strong{font-weight:800;}
.rb-btn{display:inline-flex;align-items:center;gap:9px;background:#101010;color:#fff;font-weight:700;font-size:15.5px;padding:13px 24px;border-radius:11px;min-height:44px;box-shadow:0 8px 20px rgba(0,0,0,.28);}
.rb-btn:hover{color:#fff;transform:translateY(-1px);}
.rb-btn .bnc{color:var(--gold);}
.rb-disc{width:100%;font-size:11px;color:rgba(26,18,0,.62);line-height:1.5;}
.rb-disc a{text-decoration:underline;color:#1A1200;}

/* ===== sections (浅底) ===== */
.section{padding:64px 0;}
.section.alt{background:var(--bg-2);}
.sec-head{max-width:720px;margin:0 0 34px;}
.sec-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--gold-3);margin-bottom:12px;}
.sec-eyebrow::before{content:'';width:22px;height:2px;background:var(--gold);border-radius:2px;}
.sec-head h2{font-size:clamp(24px,3vw,34px);margin:0 0 12px;}
.sec-head p{font-size:16px;color:var(--muted);margin:0;}

/* 特性 / 步骤卡片 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.fcard{background:var(--card);border:1px solid var(--line-l);border-radius:16px;padding:24px;box-shadow:var(--sh-sm);transition:.2s var(--ease);}
.fcard:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:var(--gold-line);}
.fcard .no{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--gold-3);background:var(--gold-soft);width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:14px;}
.fcard h3{font-size:18px;margin:0 0 8px;}
.fcard p{font-size:14.5px;color:var(--text-2);margin:0;line-height:1.65;}
.fcard a.more{display:inline-flex;align-items:center;gap:4px;margin-top:12px;font-size:13.5px;font-weight:600;color:var(--gold-3);}

/* 工具网格 */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px;}
.tool-card{display:flex;flex-direction:column;gap:6px;background:var(--card);border:1px solid var(--line-l);border-radius:14px;padding:18px;transition:.18s var(--ease);}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:var(--gold);}
.tool-card .ti{font-size:22px;color:var(--gold-3);display:inline-flex;align-items:center;}
.tool-card .ti svg{width:24px;height:24px;}
.tool-card:hover .ti{color:var(--gold);}
.tool-card b{font-size:15.5px;color:var(--text);}
.tool-card small{font-size:12.5px;color:var(--muted);}
.tool-card .tag{align-self:flex-start;margin-top:4px;font-size:10.5px;font-family:var(--mono);color:var(--gold-3);background:var(--gold-soft);padding:2px 8px;border-radius:6px;}

/* 文章网格 */
.art-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.art-card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line-l);border-radius:16px;overflow:hidden;transition:.2s var(--ease);}
.art-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);}
.art-card .cover{aspect-ratio:1200/630;background:var(--ink-2);width:100%;object-fit:cover;}
.art-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;}
.art-card .cat{font-size:11.5px;font-weight:700;color:var(--gold-3);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px;}
.art-card h3{font-size:17.5px;margin:0 0 8px;line-height:1.4;}
.art-card p{font-size:14px;color:var(--text-2);margin:0 0 14px;flex:1;line-height:1.6;}
.art-card .meta{font-size:12.5px;color:var(--faint);font-family:var(--mono);}

/* 币安美股专题带 */
.topic{background:linear-gradient(120deg,#0B1220,#131B2E);color:var(--white);border-radius:22px;padding:40px;position:relative;overflow:hidden;box-shadow:var(--sh-lg);}
.topic h2{color:#fff;} .topic p{color:var(--w-72);}

/* FAQ */
.faq{max-width:820px;margin:0 auto;}
.faq details{background:var(--card);border:1px solid var(--line-l);border-radius:12px;margin-bottom:12px;overflow:hidden;}
.faq summary{padding:18px 22px;font-weight:600;font-size:16px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:12px;align-items:center;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:'+';font-size:22px;color:var(--gold-3);font-weight:400;transition:.2s;}
.faq details[open] summary::after{transform:rotate(45deg);}
.faq details[open] summary{border-bottom:1px solid var(--line-l);}
.faq .a{padding:16px 22px 20px;color:var(--text-2);font-size:15px;line-height:1.7;}

/* ===== footer ===== */
footer{background:#03060C;color:var(--w-72);padding:56px 0 30px;border-top:1px solid var(--line);}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px;}
.foot-brand .brand{margin-bottom:14px;}
.foot-tag{font-size:13.5px;color:var(--w-50);line-height:1.7;max-width:34ch;}
.foot-col h4{color:#fff;font-size:13px;text-transform:uppercase;letter-spacing:.08em;margin:0 0 14px;font-weight:700;}
.foot-col a{display:block;color:var(--w-50);font-size:13.5px;padding:5px 0;}
.foot-col a:hover{color:var(--gold-2);}
.foot-bottom{border-top:1px solid var(--line);padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--w-35);line-height:1.6;}
.foot-bottom .bnc{color:var(--gold);}

/* ===== 文章页 ===== */
.article{padding:40px 0 60px;}
.crumb{font-size:13px;color:var(--muted);margin-bottom:18px;}
.crumb a{color:var(--muted);} .crumb a:hover{color:var(--gold-3);}
.art-head h1{font-size:clamp(26px,4vw,40px);line-height:1.2;margin:0 0 16px;}
.art-lede{font-size:19px;color:var(--text-2);line-height:1.6;margin:0 0 20px;}
.art-byline{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:13.5px;color:var(--muted);padding:16px 0;border-top:1px solid var(--line-l);border-bottom:1px solid var(--line-l);margin-bottom:26px;}
.art-byline .who{font-weight:600;color:var(--text);}
.art-byline .dot{width:3px;height:3px;border-radius:50%;background:var(--faint);}
figure.article-cover{margin:0 0 28px;} figure.article-cover img{border-radius:14px;width:100%;}
figure.article-cover figcaption{font-size:12.5px;color:var(--faint);margin-top:8px;text-align:center;}
.toc{background:var(--bg-2);border:1px solid var(--line-l);border-radius:14px;padding:18px 22px;margin:0 0 30px;}
.toc b{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);}
.toc ol{margin:10px 0 0;padding-left:20px;} .toc li{margin:5px 0;font-size:14.5px;} .toc a{color:var(--text-2);} .toc a:hover{color:var(--gold-3);}
.prose{font-size:17px;line-height:1.85;color:var(--text);}
.prose h2{font-size:26px;margin:42px 0 16px;scroll-margin-top:80px;}
.prose h3{font-size:20px;margin:30px 0 12px;}
.prose p{margin:0 0 18px;} .prose ul,.prose ol{margin:0 0 18px;padding-left:24px;} .prose li{margin:7px 0;}
.prose strong{font-weight:700;color:var(--text);}
.prose a{color:var(--gold-3);text-decoration:underline;text-underline-offset:2px;}
.prose blockquote{margin:22px 0;padding:14px 20px;border-left:3px solid var(--gold);background:var(--bg-2);border-radius:0 10px 10px 0;color:var(--text-2);font-size:16px;}
.prose img{border-radius:12px;margin:22px 0;}
.callout{border:1px solid var(--line-l);border-radius:12px;padding:18px 20px;margin:24px 0;background:var(--card);display:flex;gap:14px;box-shadow:var(--sh-sm);}
.callout .ic{font-size:20px;flex:0 0 auto;color:var(--gold-3);}
.callout .ic svg{width:21px;height:21px;display:block;margin-top:2px;}
.callout.tip .ic{color:var(--up);}
.callout.warn .ic{color:var(--warn);}
.callout.risk .ic{color:var(--down);}
.callout.tip{border-color:rgba(16,185,129,.35);background:rgba(16,185,129,.05);}
.callout.warn{border-color:rgba(245,158,11,.4);background:rgba(245,158,11,.06);}
.callout.risk{border-color:rgba(244,63,94,.35);background:rgba(244,63,94,.05);}
.callout b{display:block;margin-bottom:3px;}
.callout p{margin:0;font-size:14.5px;color:var(--text-2);}
.dtable{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.5px;overflow:hidden;border-radius:12px;box-shadow:var(--sh-sm);}
.dtable th,.dtable td{padding:12px 15px;text-align:left;border-bottom:1px solid var(--line-l);}
.dtable th{background:var(--ink-2);color:#fff;font-weight:600;font-size:13.5px;}
.dtable tr:last-child td{border-bottom:none;}
.dtable tr:nth-child(even) td{background:var(--bg-2);}
/* 文章内 CTA 卡 */
.cta-inline{background:linear-gradient(120deg,#0B1220,#131B2E);border-radius:16px;padding:26px;margin:32px 0;color:var(--white);box-shadow:var(--sh-lg);}
.cta-inline .blk{margin-bottom:8px;}
.cta-inline h3{color:#fff;font-size:20px;margin:0 0 8px;}
.cta-inline p{color:var(--w-72);font-size:14.5px;margin:0 0 16px;}
.cta-inline .code-mini{font-family:var(--mono);font-weight:800;color:var(--gold-2);background:#03060C;padding:3px 10px;border-radius:6px;}
.cta-inline .cta-disc{font-size:11px;color:var(--w-35);margin-top:12px;line-height:1.5;}
/* 作者盒 */
.authorbox{display:flex;gap:16px;background:var(--bg-2);border:1px solid var(--line-l);border-radius:14px;padding:20px;margin:36px 0 0;}
.authorbox .av{width:52px;height:52px;border-radius:50%;background:linear-gradient(135deg,var(--gold-2),var(--gold-3));flex:0 0 auto;display:flex;align-items:center;justify-content:center;font-weight:800;color:#1A1200;font-size:20px;}
.authorbox b{font-size:15px;} .authorbox p{font-size:13.5px;color:var(--muted);margin:4px 0 0;line-height:1.6;}
.related{margin-top:40px;} .related h3{font-size:18px;margin:0 0 16px;}

/* ===== 工具页 ===== */
.tool-wrap{padding:40px 0 60px;}
.tool-head h1{font-size:clamp(24px,3.4vw,34px);margin:0 0 10px;}
.tool-head p{font-size:16px;color:var(--muted);max-width:640px;margin:0 0 26px;}
.calc{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:start;}
.calc-in{background:var(--card);border:1px solid var(--line-l);border-radius:16px;padding:24px;box-shadow:var(--sh-sm);}
.field{margin-bottom:18px;} .field:last-child{margin-bottom:0;}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--text-2);margin-bottom:7px;}
.field input,.field select{width:100%;padding:12px 14px;font-size:16px;font-family:var(--mono);border:1px solid var(--line-l2);border-radius:10px;background:var(--bg);color:var(--text);min-height:44px;}
.field input:focus,.field select:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px var(--gold-soft);}
.field .row{display:flex;gap:10px;} .seg{display:flex;gap:6px;flex-wrap:wrap;}
.seg button{flex:1;min-width:60px;padding:9px;border:1px solid var(--line-l2);background:var(--bg);border-radius:9px;font-size:13.5px;cursor:pointer;color:var(--text-2);min-height:40px;}
.seg button.on{background:var(--gold);border-color:var(--gold);color:#1A1200;font-weight:700;}
.calc-out{background:linear-gradient(160deg,#0B1220,#131B2E);border:1px solid var(--gold-line);border-radius:16px;padding:26px;color:var(--white);box-shadow:var(--sh-lg);}
.calc-out .ro{margin-bottom:20px;}
.calc-out .rl{font-size:12.5px;color:var(--w-50);text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px;}
.calc-out .rv{font-family:var(--mono);font-size:38px;font-weight:800;color:var(--gold-2);line-height:1;}
.calc-out .rv.sm{font-size:24px;color:#fff;}
.calc-out .rv.up{color:var(--up);} .calc-out .rv.down{color:var(--down);}
.calc-out .rn{font-size:13px;color:var(--w-50);margin-top:6px;line-height:1.5;}
.calc-out hr{border:none;border-top:1px solid var(--line);margin:18px 0;}
.gauge-wrap{text-align:center;padding:10px 0;}
.tool-guide{margin-top:40px;background:var(--bg-2);border:1px solid var(--line-l);border-radius:16px;padding:8px 24px;}
.tool-guide summary{padding:16px 0;font-weight:700;font-size:16px;cursor:pointer;}
.tool-guide .prose{font-size:15.5px;padding-bottom:16px;}

/* ===== 合规页 ===== */
.page{padding:44px 0 60px;} .page h1{font-size:clamp(26px,4vw,38px);margin:0 0 8px;}
.page .updated{font-size:13px;color:var(--faint);font-family:var(--mono);margin-bottom:28px;}

/* ===== responsive ===== */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:26px;}
  .net{display:none;}
  .nav-links{position:fixed;top:64px;left:0;width:100vw;height:calc(100dvh - 64px);flex-direction:column;align-items:stretch;gap:0;background:#050912;padding:12px;overflow-y:auto;transform:translateX(100%);transition:transform .25s var(--ease);z-index:49;}
  .nav-links.open{transform:translateX(0);}
  .nav-item{width:100%;} .nav-item>a{width:100%;font-size:16px;padding:14px 12px;border-bottom:1px solid var(--line);}
  .dd{position:static;transform:none;opacity:1;visibility:visible;min-width:0;background:transparent;border:none;box-shadow:none;padding:4px 0 10px 18px;}
  .nav-item:hover .dd{transform:none;}
  .lang{margin:12px 0 0;padding:12px;}
  .nav-burger{display:flex;align-items:center;justify-content:center;}
  .grid-3,.grid-4,.art-grid{grid-template-columns:repeat(2,1fr);}
  .calc{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .section{padding:48px 0;}
}
@media(max-width:600px){
  .grid-3,.grid-4,.art-grid,.grid-2{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr 1fr;}
  .only-mobile{display:block;}
}
@media(max-width:420px){
  .wrap,.wrap-a{padding:0 15px;}
  .hero{padding:22px 0 26px;}
  .eyebrow{margin-bottom:12px;}
  .hero h1{font-size:25px;margin-bottom:16px;}
  .pass{padding:16px;} .codebox .cv{font-size:22px;}
  .chips{margin-top:14px;}
  .rb-text{font-size:16px;} .rb-btn{width:100%;justify-content:center;}
  .topic{padding:26px;}
  .foot-grid{grid-template-columns:1fr;}
  .prose{font-size:16px;}
}

.topic-index{display:grid;grid-template-columns:repeat(auto-fit,minmax(205px,1fr));gap:26px 34px;}
.topic-index .tg h4{color:var(--gold-3);font-size:12.5px;text-transform:uppercase;letter-spacing:.07em;margin:0 0 10px;font-weight:800;}
.topic-index .tg a{display:block;color:var(--text-2);font-size:14px;padding:6px 0;line-height:1.4;border-top:1px solid var(--line-l);transition:color .15s;}
.topic-index .tg a:first-of-type{border-top:none;}
.topic-index .tg a:hover{color:var(--gold-3);}