/* ==========================================================================
   大港奥 · 共享站点层  /assets/site.css
   设计语汇：海港夜航灯 / 航标刻度 / 信号橙 / 海图等高线
   ========================================================================== */

:root{
  --deep-teal:#0B3A3F;
  --ink-teal:#07262B;
  --signal:#F26B2A;
  --amber:#F5B84B;
  --warm-white:#F7F3EA;
  --chart-mint:#DCE8E5;
  --mist:#C9D2D0;
  --stone:#5E6B6A;
  --moss:#6F7F5E;
  --clay:#B86B4B;

  --on-dark:rgba(247,243,234,.80);
  --on-dark-soft:rgba(247,243,234,.58);
  --on-dark-strong:#F7F3EA;
  --hair-dark:rgba(201,210,208,.18);
  --hair-light:rgba(11,58,63,.14);

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1200px;
  --header-h:72px;
  --r-lg:28px;
  --r-md:18px;
  --r-sm:12px;
  --r-pill:999px;
  --ease:cubic-bezier(.22,1,.36,1);
  --shadow-card:0 26px 52px -38px rgba(7,38,43,.62);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 18px);
}
body{
  margin:0;
  background:var(--warm-white);
  color:var(--stone);
  font-family:var(--font-body);
  font-size:clamp(16px,.42vw + 14.6px,18px);
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg{max-width:100%;height:auto}
a{color:inherit}
button{font:inherit;color:inherit}
::selection{background:rgba(242,107,42,.26);color:var(--ink-teal)}

/* ---------- 焦点 ---------- */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible{
  outline:2px solid var(--amber);
  outline-offset:3px;
}

/* ---------- 容器与节奏 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,40px);
}
.section{padding-block:clamp(44px,6.4vw,88px)}
.section--tight{padding-block:clamp(24px,3.6vw,44px)}
.rule{height:1px;border:0;background:var(--hair-light);margin-block:clamp(22px,4vw,40px)}
.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  margin:-1px;padding:0;border:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);
  white-space:nowrap;
}

/* ---------- 排版件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--deep-teal);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:var(--signal);
}
.display-title{
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(2.1rem,5vw,3.6rem);
  line-height:1.1;
  letter-spacing:-.03em;
  color:var(--ink-teal);
}
.lede{
  margin-top:18px;
  max-width:46ch;
  font-size:clamp(1rem,.4vw + .92rem,1.08rem);
  line-height:1.8;
  color:var(--stone);
}
.num{
  display:block;
  font-family:var(--font-mono);
  font-weight:500;
  font-size:clamp(1.8rem,4vw,3.2rem);
  letter-spacing:-.02em;
  line-height:1;
  color:var(--deep-teal);
}

/* ---------- 按钮与标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  padding:11px 22px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-family:var(--font-display);
  font-weight:600;
  font-size:.9rem;
  letter-spacing:.04em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s var(--ease),background .18s var(--ease),
             color .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.btn-signal{
  background:var(--signal);
  color:var(--ink-teal);
  box-shadow:0 10px 24px -14px rgba(242,107,42,.95);
}
.btn-signal:hover{background:var(--amber);transform:translateY(-1px)}
.btn-signal:active{transform:translateY(0)}
.btn-ghost{
  background:transparent;
  color:var(--deep-teal);
  border-color:var(--mist);
}
.btn-ghost:hover{border-color:var(--deep-teal);background:var(--chart-mint)}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 13px;
  border-radius:var(--r-pill);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  background:var(--chart-mint);
  color:var(--deep-teal);
  border:1px solid var(--hair-light);
}
.chip--signal{background:rgba(242,107,42,.14);color:#9A3F14;border-color:rgba(242,107,42,.34)}
.chip--moss{background:rgba(111,127,94,.16);color:#4B573F;border-color:rgba(111,127,94,.34)}

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  background:var(--warm-white);
  border:1px solid var(--hair-light);
  border-radius:var(--r-lg);
  padding:clamp(20px,3vw,34px);
  box-shadow:var(--shadow-card);
}
.card--mint{background:var(--chart-mint);border-color:transparent;box-shadow:none}
.card--dark{background:var(--deep-teal);border-color:transparent;color:var(--on-dark)}
.card--dark .display-title,.card--dark .num,.card--dark h2,.card--dark h3{color:var(--on-dark-strong)}

/* ---------- 栅格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

/* ---------- 面包屑 ---------- */
.breadcrumbs{margin-block:clamp(18px,2.6vw,30px)}
.crumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--stone);
}
.crumb-list a{
  color:var(--deep-teal);
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.crumb-list a:hover{border-bottom-color:var(--signal);color:var(--ink-teal)}
.crumb-sep{color:var(--mist)}
.crumb-list [aria-current="page"]{color:var(--stone)}

/* ---------- 图片容器基础规则 ---------- */
.figure{display:grid;gap:12px;margin:0}
.figure-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/10;
  border-radius:var(--r-lg);
  background:var(--chart-mint);
  border:1px solid var(--hair-light);
}
.figure-frame img,
.figure-frame svg{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(11,58,63,.07) 0 1px,transparent 1px 26px);
  opacity:.7;
  mix-blend-mode:multiply;
}
.figure--wide .figure-frame{aspect-ratio:21/9}
.figure--portrait .figure-frame{aspect-ratio:4/5}
.figure-caption{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--stone);
  text-transform:uppercase;
}

/* ==========================================================================
   头部：航标命令栏
   ========================================================================== */
.skip-link{
  position:fixed;
  top:10px;
  left:50%;
  z-index:200;
  transform:translate(-50%,-180%);
  padding:10px 22px;
  border-radius:var(--r-pill);
  background:var(--amber);
  color:var(--ink-teal);
  font-family:var(--font-display);
  font-weight:600;
  font-size:.9rem;
  text-decoration:none;
  box-shadow:0 16px 34px -18px rgba(0,0,0,.7);
  transition:transform .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translate(-50%,0)}

.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--deep-teal);
  color:var(--on-dark-strong);
  border-bottom:1px solid var(--hair-dark);
  transition:box-shadow .26s var(--ease),background .26s var(--ease);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:3px;
  height:6px;
  pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(220,232,229,.5) 0 1px,transparent 1px 14px);
  opacity:.22;
}
.site-header.is-scrolled{
  background:var(--ink-teal);
  box-shadow:0 20px 42px -34px rgba(0,0,0,.95);
}
.header-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:clamp(10px,1.6vw,22px);
  min-height:var(--header-h);
  padding-block:12px;
}

/* 品牌 */
.brand{
  order:0;
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:11px;
  text-decoration:none;
  color:var(--on-dark-strong);
}
.brand-mark{
  position:relative;
  display:grid;
  place-items:center;
  width:36px;height:36px;
  border-radius:var(--r-sm);
  border:1px solid rgba(245,184,75,.55);
  background:linear-gradient(150deg,rgba(245,184,75,.2),rgba(11,58,63,0) 70%);
}
.brand-mark::before{
  content:"";
  width:9px;height:9px;
  border-radius:50%;
  background:var(--signal);
  box-shadow:0 0 0 4px rgba(242,107,42,.18);
  animation:signal-pulse 3.2s var(--ease) infinite;
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:6px;
  border-radius:8px;
  border-top:1px solid rgba(245,184,75,.55);
  transform:rotate(-32deg);
  opacity:.8;
}
@keyframes signal-pulse{
  0%,72%,100%{box-shadow:0 0 0 4px rgba(242,107,42,.18)}
  84%{box-shadow:0 0 0 9px rgba(242,107,42,.06)}
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{
  font-family:var(--font-display);
  font-weight:600;
  font-size:1.04rem;
  letter-spacing:.02em;
  color:var(--on-dark-strong);
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:rgba(247,243,234,.6);
}

/* 导航 */
.site-nav{
  order:1;
  margin-left:auto;
  min-width:0;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav-list a{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:7px;
  padding:9px 13px;
  border-radius:var(--r-pill);
  color:rgba(247,243,234,.86);
  font-size:.92rem;
  letter-spacing:.02em;
  text-decoration:none;
  white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-idx{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.06em;
  color:rgba(245,184,75,.7);
  transition:color .18s var(--ease);
}
.nav-list a:hover{background:rgba(220,232,229,.13);color:var(--warm-white)}
.nav-list a:hover .nav-idx{color:var(--amber)}
.nav-list a[aria-current="page"]{
  background:rgba(242,107,42,.18);
  color:var(--on-dark-strong);
}
.nav-list a[aria-current="page"] .nav-idx{color:var(--amber)}

/* 头部队列动作 */
.header-cta{
  order:2;
  flex:0 0 auto;
  position:relative;
  padding:10px 20px;
}
.header-cta::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--ink-teal);
  opacity:.7;
}

/* 移动导航按钮 */
.nav-toggle{
  order:3;
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 15px;
  border-radius:var(--r-pill);
  border:1px solid rgba(220,232,229,.3);
  background:transparent;
  color:var(--on-dark-strong);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle:hover{border-color:rgba(220,232,229,.6);background:rgba(220,232,229,.08)}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:currentColor;
  transition:background .2s var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .26s var(--ease),top .26s var(--ease);
}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:0;transform:rotate(-45deg)}
.nav-toggle-label{white-space:nowrap}

/* 滚动进度 */
.header-progress{
  position:absolute;
  left:0;bottom:0;
  z-index:3;
  width:100%;
  height:3px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--amber),var(--signal));
  pointer-events:none;
}

/* ==========================================================================
   页脚：夜航海图
   ========================================================================== */
.site-footer{
  position:relative;
  overflow:hidden;
  margin-top:clamp(56px,8vw,110px);
  padding-top:clamp(46px,6.4vw,78px);
  background:var(--ink-teal);
  color:var(--on-dark);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:radial-gradient(128% 92% at 88% -6%,rgba(11,58,63,.95),transparent 62%);
}
.footer-contours{
  position:absolute;
  top:-28%;
  right:-14%;
  width:min(700px,86%);
  aspect-ratio:1;
  border-radius:50%;
  pointer-events:none;
  opacity:.5;
  background:repeating-radial-gradient(circle at 50% 50%,rgba(220,232,229,.13) 0 1px,transparent 1px 28px);
}
.footer-contours::after{
  content:"";
  position:absolute;
  inset:15%;
  border-radius:50%;
  background:repeating-radial-gradient(circle at 50% 50%,rgba(245,184,75,.15) 0 1px,transparent 1px 22px);
}
.footer-inner{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.35fr);
  gap:clamp(26px,3.6vw,54px);
  padding-block:clamp(12px,2vw,22px) clamp(38px,5vw,58px);
  border-bottom:1px solid var(--hair-dark);
}
.footer-brand{min-width:0}
.footer-kicker{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--amber);
}
.footer-title{
  margin-top:12px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(1.35rem,2.4vw,1.7rem);
  letter-spacing:-.01em;
  color:var(--on-dark-strong);
}
.footer-note{
  margin-top:12px;
  max-width:34ch;
  font-size:.92rem;
  line-height:1.8;
  color:var(--on-dark-soft);
}
.footer-cta{
  display:inline-flex;
  align-items:center;
  gap:9px;
  margin-top:20px;
  padding:10px 18px;
  border-radius:var(--r-pill);
  border:1px solid rgba(242,107,42,.5);
  background:rgba(242,107,42,.16);
  color:var(--on-dark-strong);
  font-family:var(--font-display);
  font-weight:600;
  font-size:.88rem;
  letter-spacing:.04em;
  text-decoration:none;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.footer-cta::after{content:"→";font-family:var(--font-mono);font-size:.95em}
.footer-cta:hover{background:var(--signal);color:var(--ink-teal);transform:translateX(2px)}
.footer-group{min-width:0}
.footer-group-title{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--amber);
}
.footer-list{display:grid;gap:11px}
.footer-list a{
  color:var(--on-dark);
  font-size:.93rem;
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-list a:hover{color:var(--on-dark-strong);border-bottom-color:var(--signal)}
.footer-contact{min-width:0}
.contact-list{display:grid;gap:13px}
.contact-row{
  display:grid;
  grid-template-columns:44px minmax(0,1fr);
  gap:10px;
  align-items:start;
}
.contact-label{
  padding-top:4px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:rgba(247,243,234,.46);
}
.contact-value{
  color:var(--on-dark-strong);
  font-size:.92rem;
  line-height:1.6;
  word-break:break-word;
}
.contact-note{
  margin-top:18px;
  max-width:32ch;
  font-size:.8rem;
  line-height:1.75;
  color:rgba(247,243,234,.5);
}
.footer-legal{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 26px;
  padding-block:22px 32px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:rgba(247,243,234,.55);
}
.legal-note{margin:0}
.legal-links{display:flex;flex-wrap:wrap;gap:8px 20px}
.legal-links a{
  color:rgba(247,243,234,.78);
  text-decoration:none;
  border-bottom:1px solid rgba(201,210,208,.3);
  padding-bottom:2px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.legal-links a:hover{color:var(--amber);border-color:var(--amber)}

/* ==========================================================================
   滚动显现协议
   ========================================================================== */
[data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
  transition-delay:calc(var(--reveal-i,0) * 60ms);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1100px){
  .nav-list a{padding:9px 10px;font-size:.88rem}
  .nav-idx{display:none}
}

@media (max-width:1024px){
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:960px){
  :root{--header-h:auto}
  .site-header{padding-block:0}
  .header-inner{padding-block:10px}
  .nav-toggle{display:inline-flex}
  .header-cta{order:2;margin-left:auto;padding:9px 16px;font-size:.86rem}
  .site-nav{
    order:4;
    flex:1 0 100%;
    margin-left:0;
    max-height:0;
    opacity:0;
    visibility:hidden;
    overflow:hidden;
    transition:max-height .34s var(--ease),opacity .22s var(--ease),visibility .34s var(--ease);
  }
  .site-header[data-open] .site-nav{
    max-height:min(66vh,540px);
    opacity:1;
    visibility:visible;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    margin-top:6px;
    padding:10px 0 16px;
    border-top:1px solid var(--hair-dark);
  }
  .nav-list a{
    padding:13px 14px;
    border-radius:14px;
    font-size:1rem;
  }
  .nav-idx{display:inline}
  .site-header[data-open]{background:var(--ink-teal)}
  .site-header[data-open] .nav-toggle{border-color:rgba(245,184,75,.7);color:var(--amber)}
}

@media (max-width:900px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:620px){
  .brand-sub{display:none}
  .brand-name{font-size:1rem}
  .header-cta{padding:8px 14px;font-size:.82rem}
  .header-cta::before{display:none}
  .footer-inner{grid-template-columns:minmax(0,1fr)}
  .footer-legal{padding-block:20px 30px;font-size:10px;letter-spacing:.08em}
  .legal-links{gap:6px 16px}
}

/* ==========================================================================
   动效降级
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
    transition-delay:0ms!important;
  }
  [data-reveal]{opacity:1;transform:none}
  .skip-link{transition:none}
  .brand-mark::before{animation:none}
}