/* =========================================================
   SSCE 南南文交官网 — 纸感国际风
   ========================================================= */
:root{
  --paper:#F5F2EB;      /* 米白纸感 */
  --card:#FFFFFF;
  --ink:#1E1C17;       /* 墨 */
  --muted:#6E6A5E;
  --green:#70A040;
  --green-d:#5A8532;
  --gold:#C0A010;
  --blue:#4080C0;
  --line:#E2DCCE;
  --deep:#22281F;       /* footer 墨绿黑 */
  --serif:"Songti SC","Noto Serif SC","Source Han Serif SC",STSong,"SimSun",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --nav-h:68px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px;overflow-x:hidden}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.skip-link{position:absolute;left:-9999px;top:8px;z-index:200;background:var(--ink);color:#fff;padding:8px 16px;border-radius:8px}
.skip-link:focus{left:8px}

/* ---------- 吸顶导航 ---------- */
.nav{position:fixed;inset:0 0 auto 0;height:var(--nav-h);z-index:100;transition:background .35s var(--ease),box-shadow .35s var(--ease)}
.nav.is-scrolled{background:rgba(245,242,235,.88);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line)}
.nav-inner{max-width:1160px;height:100%;margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:40px;height:auto}
.brand-name{font-family:var(--serif);font-weight:700;font-size:21px;letter-spacing:.05em;white-space:nowrap;line-height:1.2}
html[lang="en"] .brand-name{font-size:23px;letter-spacing:.12em;white-space:nowrap !important}
.nav-links{display:flex;gap:6px;margin-left:auto}
.nav-link{position:relative;padding:8px 14px;font-size:15px;color:var(--muted);border-radius:8px;transition:color .25s}
.nav-link:hover{color:var(--ink)}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;background:var(--gold);border-radius:2px}
.nav-right{display:flex;align-items:center;gap:10px}
.lang-switch{
  font-family:var(--sans);font-size:13px;font-weight:700;letter-spacing:.06em;
  border:1.5px solid var(--ink);background:transparent;color:var(--ink);
  padding:5px 14px;border-radius:999px;cursor:pointer;transition:all .25s var(--ease);
}
.lang-switch:hover{background:var(--ink);color:#fff}
.nav-burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-burger span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s var(--ease),opacity .3s}
.nav-burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-burger.is-open span:nth-child(2){transform:rotate(-45deg)}

/* ---------- 通用 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15.5px;font-weight:600;letter-spacing:.02em;
  padding:14px 34px;border-radius:999px;cursor:pointer;
  transition:all .3s var(--ease);border:1.5px solid transparent;
}
.btn-primary{background:var(--ink);color:#F5F2EB}
.btn-primary:hover{background:var(--green-d);transform:translateY(-2px);box-shadow:0 10px 24px rgba(34,40,31,.18)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn-lg{padding:18px 46px;font-size:17px}

.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}

.section{max-width:1160px;margin:0 auto;padding:110px 24px 40px}

/* ---------- HERO ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden;padding:calc(var(--nav-h) + 40px) 24px 80px}
.hero::after{content:"";position:absolute;right:5%;bottom:10%;width:200px;height:130px;background-image:radial-gradient(rgba(30,28,23,.16) 1.2px,transparent 1.4px);background-size:18px 18px;opacity:.55;pointer-events:none}

.hero-inner{position:relative;z-index:2;max-width:1160px;margin:0 auto;width:100%}
.eyebrow{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-size:14px;letter-spacing:.22em;color:var(--muted);margin-bottom:26px;text-transform:uppercase}
.eyebrow .dot{color:var(--gold);font-size:18px}
.hero-title{
  font-family:var(--serif);font-weight:700;
  font-size:clamp(44px,7.4vw,86px);
  line-height:1.14;letter-spacing:.02em;margin-bottom:30px;
}
.hero-title span{display:block}
.hero-title span:nth-child(2){color:var(--green-d)}
.hero-sub{max-width:640px;font-size:clamp(16px,1.6vw,19px);color:var(--muted);margin-bottom:42px}
.hero-cta{display:flex;flex-wrap:wrap;gap:16px}

.hero-deco{position:absolute;inset:0;pointer-events:none}
.blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.blob-gold{width:400px;height:400px;background:#F3E2AE;top:-100px;right:-60px;animation:drift 16s ease-in-out infinite alternate}
.blob-blue{width:380px;height:380px;background:#D4E4F4;bottom:-100px;left:-60px;animation:drift 19s ease-in-out infinite alternate-reverse}
.blob-green{width:240px;height:240px;background:#DCE9CC;top:40%;right:6%;left:auto;opacity:.6;animation:drift 22s ease-in-out infinite alternate}
@keyframes drift{from{transform:translate(0,0) scale(1)}to{transform:translate(-40px,30px) scale(1.12)}}
.hex{position:absolute;fill:none;stroke-width:1.6}
.hex-1{width:180px;height:180px;stroke:var(--gold);opacity:.55;top:16%;right:9%;animation:spin 60s linear infinite}
.hex-2{width:110px;height:110px;stroke:var(--blue);opacity:.45;top:56%;right:30%;animation:spin 46s linear infinite reverse}
.hex-3{width:76px;height:76px;stroke:var(--green);opacity:.5;bottom:16%;left:12%;animation:spin 34s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.scroll-hint{
  position:absolute;bottom:28px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.3em;color:var(--muted);text-transform:uppercase;z-index:2;
}
.scroll-line{width:1px;height:44px;background:linear-gradient(var(--ink),transparent);animation:drip 2s var(--ease) infinite}
@keyframes drip{0%{transform:scaleY(0);transform-origin:top}45%{transform:scaleY(1);transform-origin:top}55%{transform:scaleY(1);transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ---------- Section head ---------- */
.section-head{display:flex;align-items:baseline;gap:22px;margin-bottom:26px}
.sec-index{font-family:var(--serif);font-size:22px;font-weight:700;color:var(--gold)}
.sec-title{font-family:var(--serif);font-size:clamp(30px,3.6vw,44px);font-weight:700;letter-spacing:.04em}
.sec-en{margin-top:4px;font-size:13px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}

/* ---------- ABOUT ---------- */
.about-body{max-width:880px}
.lead{font-family:var(--serif);font-size:clamp(18px,1.9vw,23px);line-height:1.9;margin-bottom:18px}
.about-body>p{color:var(--muted);margin-bottom:14px;max-width:760px}
.values{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:52px}
.value{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px 22px;transition:all .35s var(--ease)}
.value:hover{transform:translateY(-6px);border-color:var(--green);box-shadow:0 14px 30px rgba(34,40,31,.08)}
.value h3{font-family:var(--serif);font-size:18px;margin-bottom:10px;letter-spacing:.03em}
.value h3::before{content:"";display:block;width:26px;height:3px;background:var(--green);border-radius:3px;margin-bottom:12px}
.value p{font-size:14px;color:var(--muted);line-height:1.8}

/* ---------- SERVICES ---------- */
.sec-note{margin-bottom:48px;color:var(--muted);max-width:680px}
.cards{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.card{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:20px;padding:32px 30px 30px;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s var(--ease);
  overflow:hidden;
}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--accent,var(--blue));transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease)}
.card:hover{transform:translateY(-8px);box-shadow:0 20px 44px rgba(34,40,31,.10);border-color:transparent}
.card:hover::before{transform:scaleX(1)}
.card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.card-no{font-family:var(--serif);font-size:26px;font-weight:700;color:var(--accent,var(--blue));opacity:.85}
.ico{width:46px;height:46px;stroke:var(--ink);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;fill:none;opacity:.85}
.card:nth-child(1){--accent:var(--blue)}
.card:nth-child(2){--accent:var(--green)}
.card:nth-child(3){--accent:var(--gold)}
.card:nth-child(4){--accent:var(--green-d)}
.card-title{font-family:var(--serif);font-size:24px;font-weight:700;letter-spacing:.03em;margin-bottom:12px}
.card-en{display:block;font-family:var(--sans);font-size:11.5px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);opacity:.8;margin-top:5px}
html[lang="en"] .card-en{display:none}
.card-desc{color:var(--muted);font-size:15px;margin-bottom:16px}
.card-more{margin:-6px 0 14px;font-size:13.5px}
.card-more a{color:var(--green-d);font-weight:600;border-bottom:2px solid var(--green);padding-bottom:1px;transition:opacity .25s;display:inline-flex;align-items:center;gap:2px}
.card-more a:hover{opacity:.65}
.card-points li{position:relative;padding-left:20px;font-size:14.5px;color:var(--ink);margin-bottom:8px}
.card-points li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:var(--accent,var(--blue));opacity:.7}
.card-link{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;color:var(--green-d);border-bottom:1.5px solid var(--green);padding-bottom:2px;transition:opacity .25s}
.card-link:hover{opacity:.7}

/* ---------- SHOWCASE ---------- */
.showcase{position:relative;min-height:540px;margin:110px 0 0;display:flex;align-items:flex-end;overflow:hidden}
.showcase-img{position:absolute;inset:0;background-size:cover;background-position:center 30%;transform:scale(1.02);transition:transform 8s var(--ease);background-image:image-set(url("/images/anime-hero.webp") type("image/webp"), url("/images/anime-hero.png") type("image/png"))}
.showcase:hover .showcase-img{transform:scale(1.08)}
.showcase-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,26,18,.24) 0%,rgba(20,26,18,.62) 48%,rgba(20,26,18,.97) 100%)}
.showcase-tag,.showcase-title,.showcase-sub{text-shadow:0 2px 22px rgba(10,14,9,.6)}
.showcase-body{position:relative;z-index:2;max-width:1160px;margin:0 auto;padding:0 24px 64px;width:100%}
.showcase-tag{font-size:13px;letter-spacing:.26em;text-transform:uppercase;color:#E8D9A8;margin-bottom:14px}
.showcase-title{font-family:var(--serif);color:#F7F4EC;font-size:clamp(28px,4vw,48px);font-weight:700;letter-spacing:.05em;margin-bottom:14px}
.showcase-sub{max-width:620px;color:rgba(247,244,236,.82);font-size:16px;white-space:pre-line}

/* ---------- CONTACT ---------- */
.contact{min-height:62vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:120px 24px}
.contact-inner{display:flex;flex-direction:column;align-items:center}
.contact-inner .sec-index{margin-bottom:16px}
.contact-title{font-family:var(--serif);font-size:clamp(34px,5vw,58px);font-weight:700;letter-spacing:.05em;margin-bottom:22px}
.contact-sub{max-width:600px;color:var(--muted);margin-bottom:44px;white-space:pre-line}
.contact-loc{margin-top:30px;font-size:13.5px;letter-spacing:.24em;color:var(--muted);text-transform:uppercase}

/* ---------- FOOTER ---------- */
.footer{background:var(--deep);color:#D9D5C8;margin-top:40px}
.footer-inner{max-width:1160px;margin:0 auto;padding:72px 24px 34px}
.footer-brand{display:flex;align-items:center;gap:18px;margin-bottom:44px}
.footer-mark{height:56px;width:auto}
.footer-cn{font-family:var(--serif);font-size:21px;font-weight:700;letter-spacing:.05em;color:#F7F4EC;line-height:1.4}
.footer-en{font-size:12.5px;color:#9B9686;letter-spacing:.02em;line-height:1.6}
.footer-grid{display:grid;grid-template-columns:1.3fr 1.5fr 1fr;gap:36px;padding-bottom:48px;border-bottom:1px solid rgba(217,213,200,.16)}
.footer-grid p.f-en{color:#9B9686}
.fcol h4{font-family:var(--serif);font-size:15px;color:#F7F4EC;letter-spacing:.1em;margin-bottom:14px}
.fcol p{font-size:14px;line-height:1.9;color:#B9B4A4}
.f-name{color:#F7F4EC !important;font-weight:600}
.f-name-en{font-size:12.5px !important;letter-spacing:.02em}
.f-en{font-size:12.5px !important;margin-top:6px;line-height:1.8 !important}
.fcol a{border-bottom:1px solid rgba(217,213,200,.4);padding-bottom:1px;transition:color .25s}
.fcol a:hover{color:#fff}
.footer-bottom{padding-top:26px;display:flex;flex-wrap:wrap;gap:10px 26px;justify-content:space-between;font-size:13px;color:#9B9686}
.f-icp a{color:#C9C4B2;border-bottom:1px solid rgba(217,213,200,.3)}

/* ---------- 调试：flat 模式（整页截图用，?flat=1） ---------- */
.flat .hero{min-height:0}
.flat .hero .scroll-hint{display:none}
.flat .contact{min-height:0}

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  .values{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav-inner{padding:0 20px}
  .nav-links{
    position:fixed;top:var(--nav-h);left:0;right:0;
    flex-direction:column;background:rgba(245,242,235,.97);backdrop-filter:blur(14px);
    padding:12px 20px 20px;gap:2px;border-bottom:1px solid var(--line);
    transform:translateY(-8px);opacity:0;pointer-events:none;transition:all .3s var(--ease);
  }
  .nav-links.is-open{transform:none;opacity:1;pointer-events:auto}
  .nav-link{padding:12px 8px;font-size:16px}
  .nav-burger{display:flex}
  .nav-right{margin-left:auto}
  .cards{grid-template-columns:1fr}
  .section{padding:84px 20px 40px}
  .hero{padding-left:20px;padding-right:20px}
  .showcase-body{padding:0 20px 64px}
  .footer-inner{padding:60px 20px 34px}
  .hero{min-height:92vh}
  .blob{display:none}
  .hex{display:none}
  .brand-name{font-size:17px}
  html[lang="en"] .eyebrow{display:none}
  .eyebrow{flex-direction:column;align-items:flex-start;gap:0;font-size:11px;letter-spacing:.1em;line-height:2;margin-bottom:18px}
  .eyebrow .dot{display:none}
  .hero::after{display:none}
}
@media(max-width:520px){
  .values{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .hero-title{font-size:42px}
}
@media(max-width:360px){
  .brand-name{font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}