/* 51吃瓜：暗色资讯聚合风。无外链字体、无第三方框架。 */
:root{
  --brand:#C84A5A;
  --brand-2:#D08A48;
  --ink:#F1EEEE;
  --muted:#A9A3A6;
  --deep:#121214;
  --bg:#17171A;
  --card:#222226;
  --card-2:#29292E;
  --accent:#E59A3A;
  --line:#39393F;
  --soft-line:rgba(241,238,238,.1);
  --max:1180px;
  --text:760px;
  --radius:24px;
  --radius-sm:14px;
  --shadow:0 24px 60px rgba(0,0,0,.28);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--deep)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.75;text-rendering:optimizeLegibility}
body.modal-open{overflow:hidden}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
img{display:block;max-width:100%;height:auto}
button,input{font:inherit}
button{color:inherit}
code{padding:.15em .42em;border:1px solid var(--line);background:var(--card);border-radius:6px;color:#ffd9a5}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;left:16px;top:12px;z-index:1000;background:var(--accent);color:#1a130b;padding:10px 14px;border-radius:10px;transform:translateY(-160%);transition:.2s}
.skip-link:focus{transform:translateY(0)}
.editorial-shell{width:min(calc(100% - 40px),var(--max));margin-inline:auto}
.eyebrow{display:inline-flex;align-items:center;gap:8px;text-transform:none;letter-spacing:.08em;font-size:.78rem;font-weight:800;color:#e7b16b}
.eyebrow:before{content:"";width:26px;height:1px;background:currentColor}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{line-height:1.18;letter-spacing:-.025em}
h1{font-size:clamp(2.6rem,6vw,5.6rem);max-width:980px;margin-bottom:24px}
h2{font-size:clamp(1.9rem,3.5vw,3.25rem);margin-bottom:18px}
h3{font-size:1.16rem;margin-bottom:10px}
p{color:#cbc6c8}
.lede{font-size:clamp(1.05rem,1.5vw,1.24rem);max-width:820px;color:#ded8da}
.site-header{position:sticky;top:0;z-index:100;background:rgba(18,18,20,.92);border-bottom:1px solid var(--soft-line);backdrop-filter:blur(16px)}
.header-inner{width:min(calc(100% - 32px),var(--max));min-height:78px;margin:auto;display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand img{width:46px;height:46px;object-fit:contain;border-radius:12px;background:var(--card)}
.brand-copy{display:grid;line-height:1.2}.brand-copy strong{font-size:1.12rem}.brand-copy small{margin-top:4px;color:var(--muted);font-size:.72rem}
.main-nav{margin-left:auto;display:flex;align-items:center;gap:3px}
.main-nav a{padding:10px 12px;border-radius:10px;color:#d2cdcf;font-size:.9rem;transition:.2s}
.main-nav a:hover,.main-nav a[aria-current="page"]{background:var(--card);color:#fff}
.search-open,.menu-toggle{border:1px solid var(--line);background:transparent;border-radius:10px;cursor:pointer}
.search-open{padding:9px 12px;color:#ddd6d8}
.menu-toggle{display:none;width:44px;height:42px;align-items:center;justify-content:center;flex-direction:column;gap:4px}
.menu-toggle span:not(.sr-only){width:18px;height:2px;background:var(--ink)}
.search-modal[hidden]{display:none !important}
.search-modal{position:fixed;inset:0;z-index:300;display:grid;place-items:start center;padding:11vh 20px 30px}
.search-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.76);backdrop-filter:blur(8px)}
.search-dialog{position:relative;z-index:1;width:min(680px,100%);background:var(--card);border:1px solid var(--line);border-radius:24px;padding:34px;box-shadow:var(--shadow)}
.search-dialog h2{font-size:2rem}.search-dialog p{max-width:540px}
.search-close{position:absolute;right:18px;top:14px;border:0;background:transparent;font-size:2rem;cursor:pointer;color:var(--muted)}
.search-form label{display:block;margin-bottom:8px;color:#eee;font-weight:700}.search-row{display:flex;gap:10px}.search-row input{min-width:0;flex:1;background:var(--deep);color:#fff;border:1px solid var(--line);border-radius:12px;padding:13px 14px}.search-row button{border:0;border-radius:12px;background:var(--accent);color:#21170a;font-weight:800;padding:0 20px;cursor:pointer}
.home-hero{padding:42px 0 82px;display:grid;grid-template-columns:minmax(0,1.18fr) minmax(360px,.82fr);gap:38px;align-items:end}
.hero-image-wrap{grid-column:1 / -1;grid-row:1;position:relative;border-radius:30px;overflow:hidden;min-height:600px;background:var(--card);box-shadow:var(--shadow)}
.hero-image-wrap img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(.82) contrast(1.05)}
.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(12,12,13,.95) 0%,rgba(12,12,13,.68) 50%,rgba(12,12,13,.2) 100%),linear-gradient(0deg,rgba(12,12,13,.72),transparent 48%)}
.hero-caption{position:absolute;right:22px;bottom:18px;color:#d8d1d3;font-size:.82rem;background:rgba(18,18,20,.7);padding:6px 10px;border-radius:20px}
.hero-copy{grid-column:1 / -1;grid-row:1;position:relative;z-index:2;max-width:780px;padding:60px 0 52px 58px;align-self:end}
.hero-copy h1{font-size:clamp(3.25rem,6.2vw,6.3rem);max-width:920px}.hero-copy .lede{max-width:700px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:12px;font-weight:800;border:1px solid transparent;transition:.2s}.button:hover{transform:translateY(-1px)}
.button.primary{background:var(--accent);color:#21170a}.button.secondary{background:var(--brand);color:#fff}.button.ghost{border-color:#666069;background:rgba(18,18,20,.35);color:#fff}
.hero-points{display:flex;flex-wrap:wrap;gap:18px;padding:0;margin:24px 0 0;list-style:none;color:#d7d1d2}.hero-points li:before{content:"✓";color:var(--accent);font-weight:900;margin-right:7px}
.intent-strip{padding:28px 0 88px}.section-heading{margin-bottom:34px}.section-heading.compact{max-width:780px}.section-heading.split-heading{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:end}.section-heading.split-heading p{margin:0 0 12px;max-width:560px}
.intent-list{border-top:1px solid var(--line)}.intent-item{display:grid;grid-template-columns:70px 1fr auto;gap:20px;align-items:center;padding:23px 10px;border-bottom:1px solid var(--line);transition:.2s}.intent-item:hover{background:rgba(255,255,255,.025);padding-left:18px}.intent-item.current{background:linear-gradient(90deg,rgba(200,74,90,.1),transparent)}.intent-no{font-variant-numeric:tabular-nums;color:var(--muted);font-size:.84rem}.intent-item span:nth-child(2){display:grid;gap:5px}.intent-item strong{font-size:1.08rem}.intent-item small{color:var(--muted)}.intent-item b{font-size:.78rem;color:var(--accent);font-weight:800}
.feature-story{padding:54px 0 92px;display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:center}.feature-copy{padding-left:6vw}.feature-copy p{font-size:1.03rem}.feature-visual{margin:0;position:relative}.feature-visual img{border-radius:28px;aspect-ratio:4/3;object-fit:cover}.feature-visual.offset:before{content:"";position:absolute;right:-24px;bottom:-24px;width:42%;height:44%;border:1px solid var(--brand-2);border-radius:24px;z-index:-1}.feature-visual figcaption{font-size:.8rem;color:var(--muted);margin-top:12px}.text-link{display:inline-flex;gap:8px;align-items:center;color:#f5be79}.text-link.strong{font-weight:800}.text-link:hover{text-decoration:underline;text-underline-offset:4px}
.check-section{padding:76px 0 92px}.numbered-checks{border-top:1px solid var(--line)}.check-row{display:grid;grid-template-columns:100px 1fr;gap:20px;padding:26px 0;border-bottom:1px solid var(--line)}.check-row>span{font-size:2rem;line-height:1;color:#6f696c;font-weight:900}.check-row h3{font-size:1.3rem}.check-row p{max-width:850px;margin-bottom:0}
.app-bridge{margin-top:38px;padding:70px 0 92px;display:grid;grid-template-columns:.92fr 1.08fr;gap:58px;align-items:center}.app-bridge-image img{border-radius:24px;aspect-ratio:1/1;object-fit:cover}.app-bridge-copy{padding-right:7vw}.inline-links{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:24px}.inline-links a{color:#f5be79;font-weight:700;border-bottom:1px solid rgba(245,190,121,.4)}
.reading-path{padding:78px 0 98px}.path-line{list-style:none;padding:0;margin:38px 0 28px;border-left:1px solid var(--line)}.path-line li{position:relative;display:grid;grid-template-columns:58px 1fr;gap:18px;padding:0 0 30px 30px}.path-line li>span{position:absolute;left:-18px;top:0;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--card);border:1px solid var(--line);color:var(--accent);font-weight:900}.path-line strong{font-size:1.15rem}.path-line p{margin:6px 0 0;max-width:760px}
.scope-section{padding:70px 0 90px;display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:start}.scope-visual img{border-radius:26px;aspect-ratio:5/4;object-fit:cover}.scope-copy{padding-top:20px}.scope-columns{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:30px}.scope-columns>div{padding-top:18px;border-top:1px solid var(--line)}.scope-columns ul{padding-left:20px;color:#cbc6c8}.scope-columns li{margin-bottom:10px}
.mobile-note{margin-top:20px;padding:46px 52px;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:26px}.mobile-note img{border-radius:18px;max-height:360px;width:100%;object-fit:cover}
.principles{padding:96px 0}.principle-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.principle-grid article{padding:24px 0 0;border-top:2px solid var(--brand)}.principle-grid article:nth-child(even){border-color:var(--brand-2)}.principle-grid p{font-size:.93rem}
.submission-mention{padding:60px 0 96px;display:grid;grid-template-columns:.95fr 1.05fr;gap:54px;align-items:center}.submission-visual img{border-radius:28px;aspect-ratio:7/5;object-fit:cover}.submission-copy{padding-right:5vw}
.faq-preview{padding:64px 0 100px;display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:start}.faq-art img{border-radius:26px;aspect-ratio:5/4;object-fit:cover}.faq-preview details{border-bottom:1px solid var(--line);padding:18px 0}.faq-preview summary{cursor:pointer;font-weight:800}.faq-preview details p{margin:12px 0 0;max-width:720px}
.end-index{padding:70px 0 110px;border-top:1px solid var(--line)}.end-index>div:first-child{max-width:760px}.end-links{display:grid;grid-template-columns:1fr 1fr;margin-top:32px;border-top:1px solid var(--line)}.end-links a{display:grid;gap:5px;padding:22px 18px 22px 0;border-bottom:1px solid var(--line)}.end-links a:nth-child(odd){border-right:1px solid var(--line);padding-right:34px}.end-links a:nth-child(even){padding-left:34px}.end-links span{color:var(--muted);font-size:.88rem}.end-links a:hover strong{color:#f5be79}
.inner-main{padding-bottom:48px}.breadcrumbs{padding:24px 0 0}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:0;list-style:none;color:var(--muted);font-size:.82rem}.breadcrumbs li:not(:last-child):after{content:"/";margin-left:8px;color:#696468}.breadcrumbs a:hover{color:#fff}
.inner-hero{padding:72px 0 92px;display:grid;grid-template-columns:1.1fr .9fr;gap:58px;align-items:center}.inner-hero h1{font-size:clamp(2.65rem,5.4vw,5.4rem)}.inner-hero-art img{border-radius:28px;aspect-ratio:4/3;object-fit:cover;box-shadow:var(--shadow)}
.text-prose{padding:48px 0 86px}.two-col-prose{display:grid;grid-template-columns:.8fr 1.2fr;gap:64px}.two-col-prose div:last-child{max-width:760px}.two-col-prose p{font-size:1.02rem}
.steps-section{padding:58px 0 88px}.step-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:22px;overflow:hidden}.step-grid article{background:var(--card);padding:30px}.step-grid article>span{font-size:.82rem;color:var(--accent);font-weight:900}.step-grid h3{margin-top:28px;font-size:1.28rem}.step-grid p{margin-bottom:0}
.split-band{margin-top:40px;margin-bottom:88px;display:grid;grid-template-columns:.95fr 1.05fr;gap:50px;align-items:center}.split-band.reverse{grid-template-columns:1.05fr .95fr}.split-band-image img{border-radius:24px;aspect-ratio:6/5;object-fit:cover}.split-band ul{padding-left:20px}.clean-list li{margin-bottom:8px;color:#d3cdcf}
.warning-panel{margin-top:54px;margin-bottom:88px;padding:36px 0;border-top:2px solid var(--brand);border-bottom:1px solid var(--line);display:grid;grid-template-columns:.8fr 1.2fr;gap:54px}.warning-panel>div:last-child{max-width:800px}.warning-panel a{color:#f5be79;text-decoration:underline;text-underline-offset:3px}
.related-box{padding:54px 0 90px}.related-links{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px}.related-links a{padding:22px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.02);display:grid;gap:6px}.related-links a:hover{border-color:#7a656a;background:rgba(200,74,90,.07)}.related-links span{color:var(--muted);font-size:.88rem}
.comparison-table{padding:56px 0 86px}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:18px}.table-wrap table{width:100%;border-collapse:collapse;min-width:720px}.table-wrap th,.table-wrap td{text-align:left;padding:18px;border-bottom:1px solid var(--line);vertical-align:top}.table-wrap th{background:var(--card);color:#fff}.table-wrap td{color:#cfc9cb}.table-wrap a{color:#f5be79;font-weight:700}
.guide-flow{padding:50px 0 82px}.guide-chapter{display:grid;grid-template-columns:90px 1fr;gap:28px;padding:32px 0;border-top:1px solid var(--line)}.guide-chapter:last-child{border-bottom:1px solid var(--line)}.guide-index{font-size:2rem;color:#70696c;font-weight:900}.guide-chapter p{max-width:860px}.guide-chapter h3{font-size:1.42rem}
.mobile-checklist{padding:50px 0 90px}.mobile-checklist ol{list-style:none;padding:0;margin:32px 0 0;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.mobile-checklist li{padding:22px;border-top:2px solid var(--brand-2);background:var(--card)}.mobile-checklist strong,.mobile-checklist span{display:block}.mobile-checklist span{margin-top:8px;color:var(--muted);font-size:.9rem}
.submit-rules{padding:52px 0 88px}.submit-rules ol{list-style:none;padding:0;margin:34px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line)}.submit-rules li{display:grid;grid-template-columns:50px 1fr;gap:14px;background:var(--card);padding:24px}.submit-rules li span{color:var(--accent);font-weight:900}.submit-rules p{margin:0}
.source-note{padding:40px 0 84px}.source-note>div:first-child{max-width:700px}.source-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}.source-grid article{padding:24px;border:1px solid var(--line);border-radius:16px}.source-grid p{margin:0}
.faq-list{padding:30px 0 90px}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{display:flex;gap:22px;align-items:flex-start;padding:22px 0;cursor:pointer;font-size:1.08rem;font-weight:800}.faq-list summary span{color:var(--accent);font-size:.8rem;padding-top:4px}.faq-list details>div{padding:0 0 24px 52px;max-width:900px}.faq-list p{margin:0}
.about-manifesto{padding:42px 0 86px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.about-manifesto article{padding:26px 0;border-top:1px solid var(--line)}.about-manifesto h2{font-size:1.7rem}.about-manifesto p{margin-bottom:0}
.safety-grid{padding:50px 0 90px;display:grid;grid-template-columns:1fr 1fr;gap:18px}.safety-grid article{padding:28px;border:1px solid var(--line);border-radius:18px;background:var(--card)}.safety-grid article>span{color:var(--accent);font-weight:900}.safety-grid h2{font-size:1.55rem;margin-top:26px}.safety-grid p{margin-bottom:0}
.privacy-sections{padding:46px 0 84px;max-width:900px}.privacy-sections article{padding:28px 0;border-top:1px solid var(--line)}.privacy-sections article:last-child{border-bottom:1px solid var(--line)}.privacy-sections h2{font-size:1.55rem}.privacy-sections p{margin-bottom:0}
.contact-types{padding:46px 0 86px}.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.contact-grid article{padding:26px;border-left:2px solid var(--brand);background:var(--card)}.contact-grid article:nth-child(even){border-left-color:var(--brand-2)}.contact-grid p{margin-bottom:0}
.feedback-prep{padding:34px 0 86px;display:grid;grid-template-columns:.8fr 1.2fr;gap:52px}.feedback-prep ol{list-style:none;padding:0;margin:0;border-top:1px solid var(--line)}.feedback-prep li{display:grid;grid-template-columns:140px 1fr;gap:18px;padding:18px 0;border-bottom:1px solid var(--line)}.feedback-prep span{color:var(--muted)}
.search-page-head{padding:72px 0 40px;max-width:900px;margin-left:auto;margin-right:auto}.search-page-head h1{font-size:clamp(2.4rem,5vw,4.4rem)}.page-search{margin-top:28px}.search-results{max-width:900px;margin-left:auto;margin-right:auto;padding:24px 0 100px}.result-summary{color:var(--muted);margin-bottom:16px}.result-list{border-top:1px solid var(--line)}.result-list a{display:grid;grid-template-columns:1.1fr 1.4fr auto;gap:18px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line)}.result-list span{color:var(--muted)}.result-list b{font-size:.8rem;color:var(--accent)}.empty-state{padding:44px;border:1px solid var(--line);border-radius:20px;background:var(--card)}.empty-state h2{font-size:1.8rem}.empty-state a{color:#f5be79;text-decoration:underline}
.not-found{padding:13vh 0 120px;max-width:900px}.not-found h1{font-size:clamp(3rem,8vw,7rem)}.not-found>p{max-width:700px;font-size:1.08rem}.compact-links{margin-top:60px}
.site-footer{border-top:1px solid var(--line);background:var(--deep);padding:70px max(20px,calc((100vw - var(--max))/2)) 28px}.footer-lead{display:grid;grid-template-columns:1fr auto;gap:34px;align-items:end;padding-bottom:46px;border-bottom:1px solid var(--line)}.footer-lead>div{max-width:720px}.footer-lead h2{font-size:clamp(1.8rem,3vw,3rem)}.footer-grid{display:grid;grid-template-columns:1.8fr repeat(3,1fr);gap:38px;padding:48px 0}.footer-brand{max-width:380px}.footer-brand p{font-size:.88rem;margin-top:18px}.footer-logo img{width:42px;height:42px}.footer-group{display:grid;align-content:start;gap:8px}.footer-group h3{font-size:.85rem;color:#fff;margin-bottom:10px}.footer-group a{color:var(--muted);font-size:.86rem}.footer-group a:hover{color:#fff}.footer-bottom{border-top:1px solid var(--line);padding-top:20px;display:flex;flex-wrap:wrap;gap:12px 24px;color:#807a7d;font-size:.78rem}.footer-bottom a{margin-left:auto;color:#aaa4a7}.back-top{position:fixed;right:20px;bottom:20px;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--card);color:#fff;box-shadow:var(--shadow);opacity:0;pointer-events:none;transform:translateY(12px);transition:.2s;cursor:pointer}.back-top.is-visible{opacity:1;pointer-events:auto;transform:none}
@media (max-width:1100px){
  .main-nav a{padding-inline:8px;font-size:.84rem}
  .home-hero{grid-template-columns:1fr}.hero-image-wrap{min-height:560px}.hero-copy{padding-left:42px}
  .feature-story,.scope-section,.app-bridge,.faq-preview,.inner-hero{gap:40px}
  .principle-grid{grid-template-columns:1fr 1fr}.mobile-checklist ol{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr}.footer-brand{grid-column:1 / -1;max-width:620px}
}
@media (max-width:900px){
  .header-inner{min-height:70px}.main-nav{display:none;position:absolute;left:16px;right:16px;top:72px;margin:0;padding:12px;border:1px solid var(--line);border-radius:16px;background:var(--card);box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.main-nav.is-open{display:flex}.main-nav a{padding:12px}.menu-toggle{display:flex;margin-left:auto}.search-open{font-size:0}.search-open:after{content:"搜索";font-size:.86rem}
  .home-hero{padding-top:28px}.hero-image-wrap{min-height:600px}.hero-copy{padding:44px 28px}.hero-copy h1{font-size:clamp(2.7rem,10vw,5rem)}
  .feature-story,.app-bridge,.scope-section,.submission-mention,.faq-preview,.inner-hero,.split-band,.split-band.reverse,.two-col-prose,.warning-panel,.feedback-prep{grid-template-columns:1fr}.feature-copy,.app-bridge-copy,.submission-copy{padding:0}.feature-visual{order:-1}.app-bridge-image,.scope-visual,.submission-visual,.faq-art,.inner-hero-art{max-width:720px}.scope-columns{grid-template-columns:1fr}
  .section-heading.split-heading{grid-template-columns:1fr;gap:10px}.mobile-note{grid-template-columns:1fr;padding:32px}.mobile-note img{max-height:420px}.about-manifesto{grid-template-columns:1fr}.footer-lead{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1 / -1}.result-list a{grid-template-columns:1fr;gap:5px}
}
@media (max-width:680px){
  .editorial-shell{width:min(calc(100% - 28px),var(--max))}.brand-copy small{display:none}.brand img{width:40px;height:40px}.header-inner{gap:10px}.search-open{padding-inline:10px}
  h1{font-size:2.6rem}h2{font-size:2rem}.home-hero{padding-bottom:58px}.hero-image-wrap{min-height:620px;border-radius:22px}.hero-copy{padding:34px 22px}.hero-caption{display:none}.hero-actions{align-items:stretch;flex-direction:column}.button{width:100%}.hero-points{display:grid;gap:7px}
  .intent-strip,.feature-story,.check-section,.app-bridge,.reading-path,.scope-section,.principles,.submission-mention,.faq-preview,.end-index{padding-top:48px;padding-bottom:64px}.intent-item{grid-template-columns:44px 1fr}.intent-item b{grid-column:2}.check-row{grid-template-columns:52px 1fr}.check-row>span{font-size:1.3rem}.scope-columns{gap:12px}.principle-grid,.step-grid,.safety-grid,.contact-grid,.submit-rules ol,.source-grid,.related-links{grid-template-columns:1fr}.submit-rules ol,.step-grid{gap:1px}.mobile-note{padding:24px;margin-top:10px}.path-line li{grid-template-columns:1fr;padding-left:26px}.path-line li>span{left:-18px}
  .end-links{grid-template-columns:1fr}.end-links a:nth-child(odd),.end-links a:nth-child(even){border-right:0;padding:18px 0}
  .inner-hero{padding:48px 0 60px}.inner-hero h1{font-size:2.7rem}.inner-hero-art{order:-1}.inner-hero-art img{border-radius:20px}.guide-chapter{grid-template-columns:44px 1fr;gap:14px}.guide-index{font-size:1.2rem}.mobile-checklist ol{grid-template-columns:1fr}.faq-list details>div{padding-left:0}.feedback-prep li{grid-template-columns:1fr;gap:6px}.search-row{flex-direction:column}.search-row button{min-height:46px}.search-dialog{padding:28px 22px}
  .footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}.footer-bottom{display:grid}.footer-bottom a{margin-left:0}.site-footer{padding-top:50px}
}
@media (max-width:420px){
  .editorial-shell{width:min(calc(100% - 22px),var(--max))}.header-inner{width:calc(100% - 20px)}.brand-copy strong{font-size:1rem}.search-open:after{content:"搜"}.hero-image-wrap{min-height:590px}.hero-copy h1{font-size:2.35rem}.hero-copy{padding-inline:18px}.inner-hero h1{font-size:2.35rem}.search-modal{padding-inline:10px}.site-footer{padding-inline:14px}
}