/* 港大社科研学行前会 · 家长阅览版
   版式：纸本档案 / 编辑部排版，不使用通用卡片与玻璃拟态 */

:root{
  --paper:#f3f0e9;
  --paper-2:#eae4d8;
  --ink:#16222d;
  --ink-2:#3d4a55;
  --ink-3:#6b7480;
  --navy:#12314f;
  --navy-2:#0c2338;
  --teal:#3f8f79;
  --red:#b23f2d;
  --line:#c9c2b2;
  --line-2:#dcd5c7;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  --serif:"Songti SC","STSong","Noto Serif CJK SC","Source Han Serif SC","SimSun",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:9;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;border-bottom:1px solid var(--line);}
a:hover{color:var(--red);border-color:var(--red)}
::selection{background:#d8e6df;color:var(--navy)}
.wrap{max-width:1180px;margin:0 auto;padding:0 36px}
.mono{font-family:var(--mono)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* 顶部：报纸刊头 */
.progress{position:fixed;top:0;left:0;right:0;height:2px;z-index:40;background:transparent}
.progress i{display:block;height:100%;background:var(--red);transform:scaleX(0);transform-origin:0 50%}
.masthead{
  position:sticky;top:0;z-index:30;background:rgba(243,240,233,.94);
  backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line);
}
.mast-inner{
  max-width:1180px;margin:0 auto;padding:11px 36px;display:flex;align-items:center;
  gap:24px;font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--ink-3)
}
.mast-logo{color:var(--navy);font-weight:700;letter-spacing:.12em}
.mast-meta{margin-left:auto}
.mast-ver{border:1px solid var(--line);padding:2px 7px;color:var(--ink-3)}
@media(max-width:700px){
  .mast-meta,.mast-sub,.mast-ver{display:none}
  .mast-inner{padding:10px 20px;gap:12px;justify-content:space-between}
  .mast-logo{white-space:nowrap;font-size:10px;letter-spacing:.06em}
  .wrap{padding:0 20px}
}

/* 左侧章节刻度 */
.rail{position:fixed;left:20px;top:50%;transform:translateY(-50%);z-index:25;display:none}
@media(min-width:1280px){.rail{display:block}}
.rail a{display:flex;align-items:center;gap:9px;border:0;padding:5px 0;font-family:var(--mono);font-size:10px;color:#a49d8e;letter-spacing:.06em}
.rail a::before{content:"";width:14px;height:1px;background:currentColor;transition:width .25s,background .25s}
.rail a.on{color:var(--red)}
.rail a.on::before{width:26px;background:var(--red)}

/* HERO */
.hero{padding:clamp(70px,12vh,140px) 0 90px;position:relative}
.hero::after{content:"";position:absolute;left:36px;right:36px;bottom:0;height:1px;background:var(--line)}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.24em;color:var(--teal);text-transform:uppercase;margin:0 0 34px}
.hero-title{
  margin:0;font-family:var(--serif);font-weight:600;
  font-size:clamp(44px,7.4vw,104px);line-height:1.14;letter-spacing:-.035em;color:var(--navy)
}
.hl{display:block;overflow:hidden;padding-bottom:.06em}
.hl i{display:block;font-style:normal;transform:translateY(0)}
.js .hl i{transform:translateY(112%)}
.hl:nth-child(2){padding-left:clamp(0px,9vw,140px)}
.hero-sub{margin:26px 0 0;font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--ink-3)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:64px;margin-top:76px;align-items:start}
.hero-lede{margin:0;font-size:17px;line-height:2;color:var(--ink-2);max-width:44em}
.hero-lede strong{color:var(--navy);font-weight:600}
.hero-lede .pencil{color:var(--red);font-family:var(--serif);font-style:italic}
.facts{margin:0;border-top:1px solid var(--ink);font-size:13px}
.facts div{display:grid;grid-template-columns:88px 1fr;gap:14px;padding:9px 0;border-bottom:1px solid var(--line-2)}
.facts dt{font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;color:var(--ink-3);padding-top:3px}
.facts dd{margin:0;color:var(--ink)}
.editor-note{
  margin-top:34px;padding:16px 18px;border-left:2px solid var(--teal);
  background:rgba(63,143,121,.06);font-size:13px;line-height:1.85;color:var(--ink-2)
}
.editor-note b{color:var(--teal);font-weight:600}
.scroll-hint{margin-top:66px;font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;color:var(--ink-3);display:flex;align-items:center;gap:12px}
.scroll-hint::after{content:"";width:52px;height:1px;background:var(--line)}
@media(max-width:860px){
  .hero-grid{grid-template-columns:1fr;gap:40px;margin-top:52px}
  .hl:nth-child(2){padding-left:0}
  .hero-title{font-size:clamp(36px,9.4vw,58px)}
  .hero::after{left:20px;right:20px}
}

/* 数字带 */
.band{background:var(--navy);color:#f2efe8;padding:44px 0}
.band-in{display:grid;grid-template-columns:repeat(5,1fr);gap:0}
.stat{padding:0 22px;border-left:1px solid rgba(255,255,255,.16)}
.stat:first-child{padding-left:0;border-left:0}
.stat-n{font-family:var(--serif);font-size:clamp(38px,4.6vw,62px);line-height:1;letter-spacing:-.03em}
.stat-n em{font-style:normal;font-size:.42em;margin-left:4px;font-family:var(--mono);letter-spacing:0}
.stat-l{font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:rgba(242,239,232,.6);margin-top:12px}
@media(max-width:760px){.band-in{grid-template-columns:repeat(2,1fr);gap:26px 0}.stat:nth-child(3){padding-left:0;border-left:0}.stat:nth-child(5){grid-column:span 2;padding-left:0;border-left:0;border-top:1px solid rgba(255,255,255,.16);padding-top:20px}}

/* 章节骨架 */
.chapter{padding:100px 0;border-bottom:1px solid var(--line)}
.chapter:last-of-type{border-bottom:0}
.ch-grid{display:grid;grid-template-columns:158px minmax(0,1fr);gap:52px}
.ch-no{font-family:var(--mono);font-size:64px;line-height:.9;color:var(--line);letter-spacing:-.06em}
.ch-label{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--teal);margin-top:20px}
.ch-head h2{font-family:var(--serif);font-size:clamp(29px,3.4vw,42px);line-height:1.3;letter-spacing:-.02em;margin:0;color:var(--navy);font-weight:600}
.ch-head p.ch-sub{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--ink-3);margin:14px 0 0}
.ch-body{margin-top:46px}
.ch-body h3{font-family:var(--serif);font-size:21px;margin:38px 0 14px;color:var(--navy);font-weight:600}
.ch-body h3:first-child{margin-top:0}
.ch-body p{margin:0 0 16px;color:var(--ink-2);font-size:15px;line-height:1.95;max-width:52em}
.ch-body strong{color:var(--ink);font-weight:600}
@media(max-width:860px){
  .chapter{padding:68px 0}
  .ch-grid{grid-template-columns:1fr;gap:18px}
  .ch-no{font-size:40px}
  .ch-label{margin-top:8px}
  .ch-body{margin-top:30px}
}

/* 表格 */
.tbl{width:100%;border-collapse:collapse;border-top:1px solid var(--ink);font-size:14.5px}
.tbl th{text-align:left;font-family:var(--mono);font-size:10px;letter-spacing:.12em;color:var(--ink-3);font-weight:400;padding:11px 14px 11px 0;border-bottom:1px solid var(--ink)}
.tbl td{padding:15px 14px 15px 0;border-bottom:1px solid var(--line-2);vertical-align:top;line-height:1.8;color:var(--ink-2)}
.tbl td:first-child{font-weight:600;color:var(--navy);white-space:nowrap;width:88px}
.tbl .hi{color:var(--red);font-weight:600}
@media(max-width:620px){.tbl th:nth-child(2),.tbl td:nth-child(2){display:none}}

/* 航班条 */
.flights{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:0 0 30px}
.flight{border:1px solid var(--line);padding:20px 22px;background:rgba(255,255,255,.34)}
.flight-k{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--teal)}
.flight-n{font-family:var(--serif);font-size:36px;line-height:1.2;color:var(--navy);margin:8px 0 4px}
.flight-r{font-family:var(--mono);font-size:12px;color:var(--ink);letter-spacing:.02em}
.flight-d{font-size:12.5px;color:var(--ink-3);margin-top:10px;line-height:1.7}
@media(max-width:620px){.flights{grid-template-columns:1fr}}

/* 提示 / 红线 */
.callout{border-left:3px solid var(--red);background:#f8ece7;padding:18px 22px;margin:26px 0;font-size:14.5px;line-height:1.9;color:var(--ink-2)}
.callout .k{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--red);display:block;margin-bottom:7px}
.note{font-family:var(--serif);font-style:italic;color:var(--red);font-size:13.5px;margin-top:12px}

/* 要点列表 */
.plist{list-style:none;padding:0;margin:0;border-top:1px solid var(--line)}
.plist li{padding:15px 0 15px 30px;border-bottom:1px solid var(--line-2);position:relative;font-size:15px;line-height:1.9;color:var(--ink-2)}
.plist li::before{content:"—";position:absolute;left:0;color:var(--teal);font-family:var(--mono)}
.plist li b{color:var(--navy);font-weight:600}

/* 学额图 */
.quota{display:flex;height:46px;width:100%;border:1px solid var(--ink);margin:22px 0 12px;font-family:var(--mono);font-size:12px}
.quota div{display:flex;align-items:center;justify-content:center;color:#fff;white-space:nowrap}
.q1{width:80%;background:var(--navy)}
.q2{width:10%;background:var(--teal)}
.q3{width:10%;background:var(--red)}
.quota-legend{display:flex;gap:22px;flex-wrap:wrap;font-size:12.5px;color:var(--ink-3);font-family:var(--mono)}
.quota-legend span::before{content:"";display:inline-block;width:9px;height:9px;margin-right:7px}
.quota-legend span:nth-child(1)::before{background:var(--navy)}
.quota-legend span:nth-child(2)::before{background:var(--teal)}
.quota-legend span:nth-child(3)::before{background:var(--red)}
.verdict{margin-top:26px;font-family:var(--serif);font-size:24px;color:var(--red);letter-spacing:-.01em}

/* 时间轴 */
.timeline{position:relative;padding-left:0;margin-top:8px}
.tl-track{position:absolute;left:70px;top:6px;bottom:6px;width:1px;background:var(--line)}
.tl-progress{position:absolute;left:70px;top:6px;bottom:6px;width:2px;background:var(--teal);transform:scaleY(0);transform-origin:50% 0}
.tl-item{display:grid;grid-template-columns:96px 1fr;gap:0;position:relative;padding:0 0 30px}
.tl-day{font-family:var(--mono);font-size:12px;color:var(--teal);padding-top:2px;letter-spacing:.04em}
.tl-day small{display:block;color:var(--ink-3);font-size:10px;margin-top:3px}
.tl-content{padding-left:34px;position:relative}
.tl-content::before{content:"";position:absolute;left:-4px;top:9px;width:9px;height:9px;background:var(--paper);border:1px solid var(--teal);transform:rotate(45deg)}
.tl-content h4{margin:0 0 5px;font-family:var(--serif);font-size:18px;color:var(--navy);font-weight:600}
.tl-content p{margin:0;font-size:14px;line-height:1.85;color:var(--ink-2)}
@media(max-width:620px){.tl-track,.tl-progress{left:0}.tl-item{grid-template-columns:1fr;gap:8px}.tl-day{padding-left:20px}.tl-content{padding-left:20px}.tl-content::before{left:-4px}}

/* 行前清单 */
.checkgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:0 34px;border-top:1px solid var(--ink)}
.checkcol{border-bottom:1px solid var(--line)}
.checkcol h4{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;color:var(--teal);margin:18px 0 10px;font-weight:400}
.checkcol label{display:flex;gap:11px;align-items:flex-start;padding:7px 0;font-size:13.5px;line-height:1.7;color:var(--ink-2);cursor:pointer}
.checkcol input{appearance:none;width:13px;height:13px;min-width:13px;border:1px solid var(--ink-3);margin:5px 0 0;cursor:pointer;position:relative;background:transparent}
.checkcol input:checked{background:var(--teal);border-color:var(--teal)}
.checkcol input:checked::after{content:"";position:absolute;left:3px;top:0px;width:4px;height:8px;border:solid #fff;border-width:0 1.5px 1.5px 0;transform:rotate(42deg)}
.checkcol input:checked + span{text-decoration:line-through;color:var(--ink-3)}
.checkbar{font-family:var(--mono);font-size:11px;color:var(--ink-3);margin-top:18px;letter-spacing:.06em}
@media(max-width:860px){.checkgrid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.checkgrid{grid-template-columns:1fr}}

/* 联系卡 */
.contacts{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:24px 0}
.contact{border:1px solid var(--line);padding:18px 18px 16px;background:rgba(255,255,255,.3)}
.contact-k{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--teal)}
.contact-n{font-family:var(--serif);font-size:22px;color:var(--navy);margin:8px 0 2px}
.contact-t{font-family:var(--mono);font-size:17px;color:var(--ink);letter-spacing:.04em}
.contact-d{font-size:12px;color:var(--ink-3);margin-top:8px;line-height:1.7}
.contact.emergency{border-color:var(--red);background:#f8ece7}
.contact.emergency .contact-t{color:var(--red);font-size:26px}
@media(max-width:700px){.contacts{grid-template-columns:1fr}}

/* 原始截屏画廊 */
.gallery{background:var(--navy-2);color:#eee9df;padding:0;position:relative;overflow:hidden}
.gallery-inner{min-height:100vh;display:flex;flex-direction:column;justify-content:center;padding:78px 0 64px}
.gallery-head{max-width:1180px;margin:0 auto 38px;padding:0 36px;width:100%}
.gallery-head .eyebrow{color:#7dbfa9;margin-bottom:14px}
.gallery-head h2{font-family:var(--serif);font-size:clamp(28px,3.6vw,44px);margin:0;color:#f3f0e9;font-weight:600;letter-spacing:-.02em}
.gallery-head p{font-size:13.5px;color:rgba(238,233,223,.6);margin:12px 0 0;line-height:1.85;max-width:50em}
.gallery-head .gh-meta{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:#7dbfa9;margin-top:16px}
.film-viewport{overflow:hidden;width:100%}
.film{display:flex;gap:26px;width:max-content;padding:0 36px;will-change:transform}
.shot{width:min(62vw,590px);flex:none;margin:0}
.shot-frame{border:1px solid rgba(255,255,255,.16);background:#091a2a;overflow:hidden;cursor:zoom-in;position:relative}
.shot-frame img{width:100%;aspect-ratio:1600/1039;object-fit:cover;transition:transform .6s cubic-bezier(.2,.7,.2,1),filter .4s}
.shot-frame:hover img{transform:scale(1.035);filter:brightness(1.08)}
.shot-frame::after{content:"点击放大";position:absolute;right:0;bottom:0;background:var(--teal);color:#fff;font-family:var(--mono);font-size:10px;letter-spacing:.1em;padding:7px 11px;opacity:0;transform:translateY(6px);transition:opacity .3s,transform .3s}
.shot-frame:hover::after{opacity:1;transform:translateY(0)}
.shot-cap{display:grid;grid-template-columns:52px 1fr;gap:14px;padding:16px 0 0}
.shot-num{font-family:var(--mono);font-size:12px;color:#7dbfa9;padding-top:3px}
.shot-time{font-family:var(--mono);font-size:10.5px;color:rgba(238,233,223,.45);letter-spacing:.1em}
.shot-title{font-family:var(--serif);font-size:20px;color:#f3f0e9;margin:5px 0 6px;line-height:1.4}
.shot-note{font-size:12.5px;color:rgba(238,233,223,.6);line-height:1.8;margin:0}
.film-end{width:36px;flex:none}
@media(max-width:900px){
  /* 手机：改为纵向单列，左右各留 20px，不再横向滑动 */
  .gallery-inner{min-height:auto;padding:58px 0 68px}
  .gallery-head{padding:0 20px;margin-bottom:34px}
  .gallery-head h2{font-size:30px}
  .film-viewport{overflow:visible}
  .film{flex-direction:column;width:100%;padding:0 20px;gap:46px;transform:none !important}
  .shot{width:100%;scroll-snap-align:none}
  .shot-cap{grid-template-columns:38px 1fr;gap:12px;padding-top:13px}
  .shot-title{font-size:18px}
  .shot-frame::after{opacity:1;transform:none}
  .film-end{display:none}
}

/* 灯箱 */
.lightbox{position:fixed;inset:0;z-index:60;background:rgba(6,16,26,.96);display:flex;flex-direction:column;opacity:0;visibility:hidden;transition:opacity .28s,visibility .28s}
.lightbox.is-open{opacity:1;visibility:visible}
.lb-top{display:flex;align-items:center;gap:18px;padding:16px 24px;border-bottom:1px solid rgba(255,255,255,.12);font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:rgba(255,255,255,.6)}
.lb-top .lb-idx{color:#7dbfa9}
.lb-close{margin-left:auto;background:none;border:1px solid rgba(255,255,255,.3);color:#fff;width:34px;height:34px;font-size:18px;line-height:1;cursor:pointer}
.lb-close:hover{background:rgba(255,255,255,.12)}
.lb-stage{flex:1;display:flex;align-items:center;justify-content:center;position:relative;min-height:0;padding:18px 66px}
.lb-stage img{max-width:100%;max-height:100%;object-fit:contain;box-shadow:0 20px 60px rgba(0,0,0,.5);transition:opacity .22s}
.lb-stage img.is-loading{opacity:.4}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;background:none;border:1px solid rgba(255,255,255,.3);color:#fff;font-size:20px;cursor:pointer}
.lb-nav:hover{background:rgba(255,255,255,.12)}
.lb-prev{left:14px}.lb-next{right:14px}
.lb-bottom{padding:14px 24px 22px;border-top:1px solid rgba(255,255,255,.12)}
.lb-title{font-family:var(--serif);font-size:20px;color:#f3f0e9;margin:0 0 4px}
.lb-note{font-size:12.5px;color:rgba(255,255,255,.55);margin:0;line-height:1.7}
@media(max-width:620px){.lb-stage{padding:10px 12px}.lb-nav{width:34px;height:34px}.lb-prev{left:4px}.lb-next{right:4px}.lb-title{font-size:16px}}

/* 待办 */
.todo{padding:100px 0 110px;background:var(--paper-2)}
.todo h2{font-family:var(--serif);font-size:clamp(29px,3.6vw,44px);color:var(--navy);margin:0 0 12px;font-weight:600}
.todo .todo-sub{font-size:14px;color:var(--ink-3);margin:0 0 40px}
.todo-list{list-style:none;padding:0;margin:0;border-top:1px solid var(--ink)}
.todo-list li{display:grid;grid-template-columns:70px 1fr;gap:20px;align-items:baseline;padding:22px 0;border-bottom:1px solid var(--line);font-size:17px;color:var(--ink)}
.todo-list .tn{font-family:var(--mono);font-size:26px;color:var(--red);letter-spacing:-.04em}
.todo-list small{display:block;font-size:13px;color:var(--ink-3);margin-top:5px;line-height:1.7}
@media(max-width:620px){.todo{padding:68px 0}.todo-list li{grid-template-columns:44px 1fr;gap:12px;font-size:15px}}

/* 页脚 */
.foot{background:var(--navy);color:rgba(242,239,232,.62);padding:52px 0 44px;font-size:12.5px;line-height:1.9}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:48px}
.foot h4{font-family:var(--serif);font-size:19px;color:#f3f0e9;margin:0 0 12px;font-weight:600}
.foot p{margin:0 0 10px;max-width:46em}
.foot .fmono{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;margin-top:26px;color:rgba(242,239,232,.4)}
.foot a{color:#9dd0bd;border-color:rgba(157,208,189,.4)}
@media(max-width:700px){.foot-grid{grid-template-columns:1fr;gap:28px}}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .hl i{transform:none}
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
}