@font-face{font-family:'BigShoulders';src:url('../fonts/BigShoulders-Bold.woff2') format('woff2'),url('../fonts/BigShoulders-Bold.ttf') format('truetype');font-weight:700;font-display:swap;}
@font-face{font-family:'BigShoulders';src:url('../fonts/BigShoulders-Regular.woff2') format('woff2'),url('../fonts/BigShoulders-Regular.ttf') format('truetype');font-weight:400;font-display:swap;}
@font-face{font-family:'WorkSans';src:url('../fonts/WorkSans-Regular.woff2') format('woff2'),url('../fonts/WorkSans-Regular.ttf') format('truetype');font-weight:400;font-display:swap;}
@font-face{font-family:'WorkSans';src:url('../fonts/WorkSans-Bold.woff2') format('woff2'),url('../fonts/WorkSans-Bold.ttf') format('truetype');font-weight:700;font-display:swap;}

:root{
  --brand:#1890FF;
  --brand-h:#69C0FF;
  --brand-a:#096DD9;
  --aqua:#14C2C7;
  --gold:#FFB020;
  --deep:#061A33;
  --deep2:#0B3B6B;
  --ink:#10233C;
  --muted:#5B6F88;
  --rule:#DCE6F2;
  --bg:#F4F8FC;
  --card:#FFFFFF;
  --danger:#F5222D;
  --ok:#52C41A;
  --radius:16px;
  --shadow:0 10px 34px rgba(16,35,60,.10);
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:'WorkSans','PingFang SC','Microsoft YaHei','Noto Sans CJK SC',sans-serif;
  color:var(--ink);
  font-size:15.5px;
  line-height:1.7;
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;}
.container{max-width:1180px;margin:0 auto;padding:0 24px;}

.breadcrumb{position:relative;display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:13.5px;color:rgba(255,255,255,.78);padding:20px 0 0;}
.breadcrumb a{color:#8FE3E6;font-weight:600;}
.breadcrumb a:hover{color:#fff;}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .cur{color:#fff;font-weight:700;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.post-date{margin:14px 0 0;font-size:13.5px;color:rgba(255,255,255,.72);}
.post-date time{font-weight:700;color:rgba(255,255,255,.9);}

.page-hero{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(160deg,#061A33 0%,#0A2A55 45%,#0B3B6B 78%,#0F4F8A 100%);
  padding:126px 0 66px;
}
.page-hero::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(560px 300px at 12% 8%, rgba(20,194,199,.28), transparent 62%),
    radial-gradient(700px 380px at 88% 12%, rgba(24,144,255,.32), transparent 60%),
    radial-gradient(520px 300px at 50% 108%, rgba(20,194,199,.18), transparent 60%);
}
.page-hero .waves{position:absolute;left:0;right:0;bottom:-2px;line-height:0;}
.page-hero .waves svg{width:100%;height:110px;}
.page-hero-inner{position:relative;z-index:2;}
.page-hero .hero-top{display:flex;flex-wrap:wrap;gap:20px;align-items:flex-start;justify-content:space-between;}
.page-hero .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(20,194,199,.16);border:1px solid rgba(20,194,199,.4);color:#8FE3E6;font-size:13px;font-weight:600;padding:6px 16px;border-radius:999px;letter-spacing:.04em;}
.page-hero h1{font-size:clamp(30px,4.2vw,52px);line-height:1.14;font-weight:800;letter-spacing:.01em;margin-top:14px;}
.page-hero .en{font-family:'BigShoulders',sans-serif;font-weight:700;font-size:15px;color:rgba(255,255,255,.6);letter-spacing:.14em;text-transform:uppercase;margin-top:6px;}
.page-hero .sub{margin:18px 0 0;font-size:16.5px;color:rgba(255,255,255,.84);max-width:620px;}

.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.badge{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:700;color:#fff;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);padding:7px 15px;border-radius:999px;}
.badge .dot{width:8px;height:8px;border-radius:50%;}
.badge.aqua .dot{background:var(--aqua);}
.badge.gold .dot{background:var(--gold);}
.badge.brand .dot{background:#4FB3FF;}

/* hero media */
.hero-media{position:relative;flex:none;width:300px;text-align:center;}
.hero-media .fig{display:block;margin:0 auto;filter:drop-shadow(0 18px 40px rgba(0,0,0,.4));}
.hero-media .fig.silhouette{width:196px;filter:drop-shadow(0 14px 30px rgba(20,194,199,.35));}
.hero-media .num{font-family:'BigShoulders',sans-serif;font-weight:700;font-size:54px;color:#7FDFE3;line-height:1;margin-top:6px;}
.hero-media .num small{font-size:16px;color:rgba(255,255,255,.6);}

/* quick facts strip */
.quick-strip{position:relative;z-index:2;margin-top:-4px;background:#fff;box-shadow:0 -2px 0 rgba(220,230,242,.6);}
.quick-strip .inner{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:26px 24px;max-width:1180px;margin:0 auto;}
.qk .k{font-size:12px;color:var(--muted);margin-bottom:4px;}
.qk .v{font-family:'BigShoulders',sans-serif;font-size:30px;font-weight:700;line-height:1;background:linear-gradient(120deg,var(--brand),var(--aqua));-webkit-background-clip:text;background-clip:text;color:transparent;}
.qk .v .cn{font-family:'WorkSans',sans-serif;font-size:16px;font-weight:700;color:var(--ink);-webkit-text-fill-color:var(--ink);margin-left:4px;}

section{padding:72px 0;}
.sec-head{max-width:760px;margin:0 auto 44px;}
.sec-head .k{display:inline-block;font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.16em;margin-bottom:10px;}
.sec-head h2{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.25;}
.sec-head p{color:var(--muted);margin-top:12px;font-size:15.5px;}
.sec-head.left{margin-left:0;max-width:720px;}

/* intro + spec grid */
.bio-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:stretch;}
.bio-card{background:var(--card);border:1px solid var(--rule);border-radius:22px;padding:30px 32px;box-shadow:0 4px 18px rgba(16,35,60,.05);}
.bio-card h3{font-size:20px;font-weight:800;margin-bottom:14px;display:flex;align-items:center;gap:10px;}
.bio-card h3 .ic{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;flex:none;}
.bio-card h3 .ic svg{width:17px;height:17px;}
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;}
.spec-item{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:13px 0;border-bottom:1px dashed var(--rule);font-size:14.5px;}
.spec-item:last-child{border-bottom:none;}
.spec-item .sk{color:var(--muted);}
.spec-item .sv{font-weight:700;display:flex;align-items:center;gap:6px;flex-wrap:wrap;justify-content:flex-end;}

.taglist{display:flex;flex-wrap:wrap;gap:6px;}
.tag{font-size:12px;font-weight:700;padding:3px 11px;border-radius:999px;}
.tag.blue{background:rgba(24,144,255,.12);color:var(--brand);}
.tag.aqua{background:rgba(20,194,199,.14);color:#0E9FA4;}
.tag.gold{background:rgba(255,176,32,.15);color:#C87B00;}
.tag.gray{background:#EEF3FA;color:var(--muted);}
.tag.red{background:rgba(245,34,45,.12);color:var(--danger);}
.tag.ok{background:rgba(82,196,26,.14);color:#3E9B12;}

/* method cards */
.m-str{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.m-card{background:var(--card);border:1px solid var(--rule);border-radius:var(--radius);padding:26px 26px;box-shadow:0 2px 12px rgba(16,35,60,.04);transition:transform .25s ease, box-shadow .25s ease;}
.m-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);}
.m-card .mtag{display:inline-flex;font-size:12px;font-weight:800;color:#fff;background:var(--brand);padding:4px 13px;border-radius:999px;letter-spacing:.02em;}
.m-card h3{font-size:17px;font-weight:800;margin:14px 0 6px;}
.m-card .sub{font-size:13px;color:var(--muted);margin-bottom:16px;}
.spec-block{background:#F7FAFE;border:1px solid var(--rule);border-radius:14px;padding:14px 16px;margin-bottom:12px;}
.spec-block .bh{font-size:12px;color:var(--muted);margin-bottom:8px;display:flex;align-items:center;gap:6px;font-weight:700;}
.spec-block .bh svg{width:14px;height:14px;}
.spec-block p{font-size:13.5px;line-height:1.6;}
.spec-block b{color:var(--ink);}
.varr{display:flex;flex-wrap:wrap;gap:8px;}
.varr span{font-size:12.5px;background:#fff;border:1px solid var(--rule);border-radius:8px;padding:3px 9px;color:var(--muted);}
.spec-block .tac{margin-top:8px;padding-top:10px;border-top:1px dashed var(--rule);font-size:13.5px;color:var(--ink);}
.spec-block .tac b{color:var(--brand);}

.season-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:4px;}
.season{display:flex;flex-direction:column;align-items:center;gap:5px;background:#F7FAFE;border:1px solid var(--rule);border-radius:12px;padding:12px 16px;min-width:70px;}
.season.on{border-color:rgba(24,144,255,.4);background:#EAF5FF;}
.season .ic{font-size:22px;letter-spacing:0;}
.season span{font-size:12px;color:var(--muted);font-weight:700;}

/* tags inline chips for footer / meta */
.meta-line{display:flex;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--muted);margin-top:10px;}
.meta-line b{color:var(--ink);}

/* related fish */
.fish-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.fish{
  background:var(--card);border:1px solid var(--rule);border-radius:var(--radius);
  padding:18px 18px;transition:transform .25s ease, box-shadow .25s ease;position:relative;overflow:hidden;
}
.fish:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(24,144,255,.4);}
.fish .fimg{height:96px;display:grid;place-items:center;margin-bottom:12px;}
.fish .fimg img{max-height:96px;max-width:100%;object-fit:contain;filter:drop-shadow(0 8px 16px rgba(16,35,60,.12));}
.fish h4{font-size:15.5px;font-weight:800;}
.fish .fd{font-size:12px;color:var(--muted);margin-top:2px;}
.fish .ftags{display:flex;gap:5px;flex-wrap:wrap;margin-top:10px;}
.fish .ftags span{font-size:11px;background:#EEF3FA;color:var(--muted);padding:2px 8px;border-radius:999px;}
.fish .no{position:absolute;right:12px;top:8px;font-family:'BigShoulders',sans-serif;font-weight:700;font-size:26px;color:rgba(24,144,255,.14);}

/* guide skeleton */
.g-hero-sub{max-width:640px;margin:16px auto 0;text-align:center;}
.g-body{background:var(--card);border:1px solid var(--rule);border-radius:22px;padding:42px 46px;box-shadow:0 4px 18px rgba(16,35,60,.05);}
.g-body p{margin-bottom:16px;font-size:15.5px;color:var(--ink);}
.g-body h2{font-size:24px;font-weight:800;margin:34px 0 14px;padding-top:6px;}
.g-body h3{font-size:18px;font-weight:800;margin:24px 0 10px;}
.g-body ul,.g-body ol{margin:0 0 16px 0;padding-left:22px;}
.g-body li{margin-bottom:8px;font-size:15px;}
.g-body table{width:100%;border-collapse:collapse;margin:16px 0;}
.g-body th,.g-body td{border:1px solid var(--rule);padding:10px 14px;font-size:14px;text-align:left;}
.g-body th{background:#F0F5FC;font-weight:800;white-space:nowrap;}
.g-body blockquote{border-left:4px solid var(--aqua);background:#F0FBFB;padding:12px 18px;border-radius:0 12px 12px 0;margin:16px 0;color:var(--ink);}
.g-body .tip{display:flex;gap:12px;background:linear-gradient(135deg,#EAF5FF,#E6FAFA);border-radius:14px;padding:16px 18px;margin:20px 0;align-items:flex-start;}
.g-body .tip .ico{flex:none;width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--aqua));display:grid;place-items:center;color:#fff;}
.g-body .tip .ico svg{width:17px;height:17px;}
.g-body .tip b{font-size:15px;}
.g-body .tip p{font-size:14px;margin:0;color:var(--muted);}
.g-cta{margin-top:34px;background:linear-gradient(135deg,#0A2A55,#0F5E96);color:#fff;border-radius:18px;padding:26px 30px;display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center;}

/* pager */
.pager{display:flex;justify-content:space-between;gap:14px;margin-top:52px;flex-wrap:wrap;}
.pager .pn{display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--rule);border-radius:14px;padding:14px 18px;max-width:48%;min-width:240px;transition:transform .2s, box-shadow .2s;}
.pager .pn:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.pager .pn .dir{font-size:12px;color:var(--muted);}
.pager .pn .ttl{font-size:15px;font-weight:800;}
.pager .pn.next{text-align:right;margin-left:auto;justify-content:flex-end;}

/* index cards (encyclopedia grid) */
.cat-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:34px;}
.cat-chips{display:flex;flex-wrap:wrap;gap:8px;}
.chip{font-size:13px;font-weight:700;padding:6px 15px;border-radius:999px;border:1px solid var(--rule);background:#fff;color:var(--muted);cursor:pointer;transition:all .2s;}
.chip:hover{border-color:var(--brand);color:var(--brand);}
.chip.active{background:var(--brand);color:#fff;border-color:var(--brand);}

#encyc-list.fish-grid{margin-top:8px;}

/* footer */
footer{background:var(--deep);color:rgba(255,255,255,.7);padding:56px 0 34px;}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:38px;}
footer .cols h5{color:#fff;font-size:15px;margin-bottom:16px;}
footer .cols li{list-style:none;margin-bottom:10px;font-size:14px;}
footer .cols li a:hover{color:#7FDFE3;}
footer .brand-desc{font-size:14px;max-width:260px;}
footer .bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:24px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;}
.foot-logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:20px;color:#fff;margin-bottom:16px;}
.foot-logo img{width:30px;height:30px;border-radius:9px;object-fit:contain;}

/* reveal：无 JS 环境不隐藏内容 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease, transform .7s ease;}
.reveal.in{opacity:1;transform:none;}
@media (scripting:none){.reveal{opacity:1;transform:none;}}

/* ---------- NAV / 按钮（子页面共用，与首页内联样式一致） ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;border-radius:999px;cursor:pointer;border:none;transition:transform .2s ease, box-shadow .2s ease, background .2s ease;white-space:nowrap;}
.btn:active{transform:scale(.97);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(24,144,255,.35);}
.btn-primary:hover{background:var(--brand-h);}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.35);backdrop-filter:blur(6px);}
.btn-ghost:hover{background:rgba(255,255,255,.24);}
.btn-dark{background:var(--ink);color:#fff;box-shadow:0 8px 20px rgba(16,35,60,.25);}
.btn-dark:hover{background:#1a3a5e;}
.btn-lg{height:52px;padding:0 30px;font-size:16px;}
.btn-md{height:44px;padding:0 22px;font-size:14.5px;}

.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(6,26,51,.42);backdrop-filter:blur(10px);transition:background .3s ease, box-shadow .3s ease;}
.nav .inner{max-width:1180px;margin:0 auto;padding:0 24px;height:66px;display:flex;align-items:center;justify-content:space-between;}
.nav.scrolled{background:rgba(255,255,255,.88);backdrop-filter:blur(14px);box-shadow:0 4px 20px rgba(16,35,60,.08);}
.nav.scrolled .links a{color:var(--ink);}
.nav.scrolled .logo{color:var(--ink);}
.nav.scrolled .nav-cta .btn{background:var(--brand);color:#fff;border-color:transparent;box-shadow:0 6px 16px rgba(24,144,255,.35);}
.nav.scrolled .nav-cta .btn:hover{background:var(--brand-h);}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:21px;color:#fff;letter-spacing:.02em;}
.logo .logo-ic{width:30px;height:30px;border-radius:9px;object-fit:contain;box-shadow:0 4px 12px rgba(24,144,255,.35);}
.links{display:flex;gap:28px;font-size:14.5px;font-weight:500;}
.links a{color:rgba(255,255,255,.85);position:relative;padding:4px 0;}
.links a::after{content:'';position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--aqua);transition:width .25s ease;}
.links a:hover{color:#fff;}
.links a:hover::after{width:100%;}
.nav .btn{margin-left:10px;}

/* 导航 CTA 悬停弹出的小程序码（仅精确指针设备，触屏点击按钮直接跳转） */
.nav-cta{position:relative;flex:none;}
.nav-cta-pop{position:absolute;top:calc(100% + 12px);right:0;width:150px;background:#fff;border-radius:16px;box-shadow:0 18px 44px rgba(16,35,60,.22);padding:10px;text-align:center;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .25s ease, transform .25s ease, visibility .25s;z-index:110;}
.nav-cta-pop img{width:100%;height:auto;display:block;border-radius:10px;}
.nav-cta-pop span{display:block;font-size:12px;color:var(--muted);font-weight:600;margin-top:6px;}
.nav-cta-pop::before{content:'';position:absolute;top:-5px;right:24px;width:10px;height:10px;background:#fff;transform:rotate(45deg);border-radius:2px;}
@media (hover:hover) and (pointer:fine){
  .nav-cta:hover .nav-cta-pop,.nav-cta:focus-within .nav-cta-pop{opacity:1;visibility:visible;transform:none;}
}

/* qrbar */
.qrbar{position:fixed;left:0;right:0;bottom:0;z-index:200;padding:0 16px 18px;pointer-events:none;transform:translateY(130%);transition:transform .45s cubic-bezier(.22,1,.36,1);}
.qrbar.show{transform:translateY(0);}
.qrbar .inner{max-width:780px;margin:0 auto;position:relative;background:linear-gradient(120deg,#0A2A55 0%,#0C4A7F 55%,#0F6BA8 100%);border-radius:26px 26px 26px 10px;box-shadow:0 24px 64px rgba(16,35,60,.30);display:flex;align-items:center;gap:28px;padding:18px 30px;pointer-events:auto;overflow:visible;}
.qrbar .inner::before{content:'';position:absolute;inset:0;border-radius:inherit;background:radial-gradient(340px 180px at 88% 0%,rgba(20,194,199,.28),transparent 60%);pointer-events:none;}
.qrbar .qr{position:relative;flex:none;width:140px;height:140px;background:#fff;border-radius:20px;padding:11px;box-shadow:0 16px 38px rgba(0,0,0,.32);margin:-6px -34px -6px 0;}
.qrbar .qr img{width:100%;height:100%;display:block;position:relative;z-index:1;border-radius:8px;object-fit:contain;}
.qrbar .qr svg{position:absolute;inset:11px;width:calc(100% - 22px);height:calc(100% - 22px);border-radius:8px;}
.qrbar .txt{flex:1;min-width:0;position:relative;}
.qrbar .txt b{display:block;font-size:18px;color:#fff;font-weight:800;}
.qrbar .txt span{display:block;font-size:13px;color:rgba(255,255,255,.78);margin-top:4px;}
.qrbar .close{position:absolute;top:-12px;right:-8px;width:28px;height:28px;border-radius:50%;background:#fff;border:1px solid var(--rule);color:var(--muted);cursor:pointer;display:grid;place-items:center;font-size:12px;box-shadow:0 3px 12px rgba(0,0,0,.3);}
.qrbar .close:hover{color:var(--ink);}

@media (max-width:980px){
  .bio-grid{grid-template-columns:1fr;}
  .m-str{grid-template-columns:repeat(2,1fr);}
  .fish-grid{grid-template-columns:repeat(3,1fr);}
  .quick-strip .inner{grid-template-columns:repeat(2,1fr);}
  .page-hero .hero-top{flex-direction:column;}
  .hero-media{width:100%;}
  .g-body{padding:30px 24px;}
  footer .cols{grid-template-columns:1fr 1fr;}
  .nav .links{display:none;}
}
@media (max-width:600px){
  .m-str{grid-template-columns:1fr;}
  .fish-grid{grid-template-columns:repeat(2,1fr);}
  .quick-strip .inner{grid-template-columns:repeat(2,1fr);}
  section{padding:52px 0;}
  footer .cols{grid-template-columns:1fr;}
  .pager .pn{max-width:100%;width:100%;}
  .g-body{padding:24px 18px;}
  .qrbar .inner{gap:14px;padding:14px 18px;border-radius:18px 18px 18px 8px;}
  .qrbar .qr{width:92px;height:92px;padding:7px;margin:-8px -6px -8px 0;border-radius:14px;}
  .qrbar .qr svg{inset:7px;width:calc(100% - 14px);height:calc(100% - 14px);}
  .qrbar .txt b{font-size:15px;}
  .qrbar .txt span{font-size:12px;}
  .qrbar .close{top:-10px;right:-4px;}
}