/* ============================================================
   365官网 · 全站共享样式  /assets/site.css
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#12100F;
  --ink-2:#0C0B0A;
  --paper:#F2ECE3;
  --paper-ink:#1A1817;
  --white:#FFFFFF;
  --chu:#B22A2E;
  --chu-deep:#7C1D22;
  --cyan:#3FE0CE;
  --cyan-ink:#08201D;
  --gold:#E9B44C;
  --teal:#0E3A3B;
  --indigo:#2A2153;
  --mist:#93A3A8;

  --line:rgba(242,236,227,.14);
  --line-strong:rgba(242,236,227,.3);
  --glass:rgba(18,16,15,.74);
  --glass-soft:rgba(242,236,227,.045);
  --shadow-1:0 20px 44px -24px rgba(0,0,0,.92);

  --radius-pill:999px;
  --radius-sm:3px;
  --wrap:1240px;
  --gutter:clamp(16px,4vw,40px);

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

  --ease:cubic-bezier(.22,1,.36,1);
  --dur:.22s;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0}
ul[class],ol[class]{list-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
img,picture,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
::selection{background:var(--cyan);color:var(--cyan-ink)}

/* ---------- 3. 基础排版 ---------- */
body{
  background-color:var(--ink);
  background-image:
    radial-gradient(120% 80% at 8% -12%, rgba(178,42,46,.30), transparent 52%),
    radial-gradient(90% 70% at 96% 2%, rgba(63,224,206,.10), transparent 46%),
    repeating-linear-gradient(0deg, rgba(242,236,227,.026) 0 1px, transparent 1px 4px);
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:1rem;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-weight:900;line-height:1.08;letter-spacing:-.02em}
h1{font-size:clamp(2.5rem,6.5vw,6rem);line-height:1.02}
h2{font-size:clamp(1.75rem,3.6vw,2.75rem)}
h3{font-size:clamp(1.25rem,2.4vw,1.75rem);font-weight:700;letter-spacing:0;line-height:1.35}
h4{font-size:1.0625rem;font-weight:700;letter-spacing:0;line-height:1.5}
p{max-width:38em}
strong{font-weight:700;color:var(--white)}
small{font-size:.8125rem}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:3px}

/* ---------- 4. 布局 ---------- */
.container{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.section{position:relative;padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(32px,4vw,56px)}
.section--chu{background:var(--chu)}
.section--teal{background:var(--teal)}
.section--indigo{background:var(--indigo)}
.section--paper{background:var(--paper);color:var(--paper-ink)}
.section--paper .eyebrow{color:var(--chu-deep)}
.section--paper .lede,.section--paper p{color:#332E29}

.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px 28px;margin-bottom:clamp(22px,3vw,38px);
}
.section-head__title{max-width:20em}

.grid{display:grid;gap:clamp(18px,2.6vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--offset>*:nth-child(even){transform:translateY(26px)}
.stack{display:flex;flex-direction:column;gap:14px}
.flow>*+*{margin-top:1.1em}
.divider{height:1px;background:var(--line);border:0}
.divider--dark{background:rgba(26,24,23,.16)}

/* ---------- 5. 文字工具 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:.55em;
  font-size:.8125rem;font-weight:600;letter-spacing:.18em;
  color:var(--cyan);text-transform:uppercase;
}
.lede{font-size:clamp(1.0625rem,1.5vw,1.25rem);line-height:1.85;color:#DCD4C9;max-width:34em}
.vert-note{
  writing-mode:vertical-rl;text-orientation:mixed;
  font-size:.8125rem;font-weight:500;letter-spacing:.18em;line-height:1;
  color:var(--mist);
}
.num-xl,.num-md,.mono-num{
  font-family:var(--font-mono);font-weight:700;font-variant-numeric:tabular-nums;
  letter-spacing:-.04em;line-height:.86;
}
.num-xl{font-size:clamp(3rem,10vw,9rem)}
.num-md{font-size:clamp(1.6rem,3vw,2.4rem);line-height:1}
.mono-num{font-size:.875rem;letter-spacing:.04em}
.c-cyan{color:var(--cyan)}
.c-gold{color:var(--gold)}
.c-chu{color:var(--chu)}
.c-mist{color:var(--mist)}

/* ---------- 6. 按钮 / 标签 / 状态 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.62em 1.15em;border-radius:var(--radius-pill);
  font-size:.875rem;font-weight:600;letter-spacing:.02em;line-height:1.2;
  white-space:nowrap;
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease),
             color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn--sm{padding:.5em .95em;font-size:.8125rem}
.btn--signal{background:var(--cyan);color:var(--cyan-ink);font-weight:700}
.btn--signal:hover{background:#62EEDF;transform:translateY(-1px)}
.btn--gold{background:var(--gold);color:#2A1F04;font-weight:700}
.btn--gold:hover{background:#F0C46A;transform:translateY(-1px)}
.btn--chu{background:var(--chu);color:var(--white)}
.btn--chu:hover{background:var(--chu-deep)}
.btn--ghost{color:var(--paper);box-shadow:inset 0 0 0 1px var(--line-strong)}
.btn--ghost:hover{color:var(--cyan);box-shadow:inset 0 0 0 1px var(--cyan)}
.btn:active{transform:translateY(1px)}

.tag{
  display:inline-flex;align-items:center;gap:.4em;
  padding:.24em .62em;border-radius:2px;
  font-size:.75rem;font-weight:600;letter-spacing:.06em;line-height:1.6;
  font-family:var(--font-mono);
  background:rgba(233,180,76,.14);color:var(--gold);
  box-shadow:inset 0 0 0 1px rgba(233,180,76,.4);
}
.tag--cyan{background:rgba(63,224,206,.14);color:var(--cyan);box-shadow:inset 0 0 0 1px rgba(63,224,206,.42)}
.tag--mist{background:rgba(147,163,168,.12);color:var(--mist);box-shadow:inset 0 0 0 1px rgba(147,163,168,.35)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 3px rgba(63,224,206,.18);flex:none}
.dot--gold{background:var(--gold);box-shadow:0 0 0 3px rgba(233,180,76,.18)}
.dot--mist{background:var(--mist);box-shadow:0 0 0 3px rgba(147,163,168,.14)}

/* ---------- 7. 内容层 ---------- */
.panel{
  position:relative;padding:clamp(18px,2.4vw,28px);
  background:var(--glass-soft);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  box-shadow:inset 0 0 0 1px var(--line);
  border-radius:var(--radius-sm);
}
.panel--solid{background:#1A1817;-webkit-backdrop-filter:none;backdrop-filter:none}
.panel--paper{background:var(--paper);color:var(--paper-ink);box-shadow:none}
.panel--chu{background:var(--chu);color:var(--white);box-shadow:inset 0 0 0 1px rgba(255,255,255,.14)}
.panel--teal{background:var(--teal);color:var(--paper)}
.panel--indigo{background:var(--indigo);color:var(--paper)}
.panel--tilt{transform:rotate(-1.5deg);transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.panel--tilt:nth-child(even){transform:rotate(1.5deg)}
.panel--tilt:hover{transform:rotate(0) translateY(-5px);box-shadow:var(--shadow-1)}

/* ---------- 8. 图片容器基础 ---------- */
.media-frame{
  position:relative;overflow:hidden;aspect-ratio:4/3;width:100%;
  background:#0A0D0D;box-shadow:inset 0 0 0 1px var(--line);
  border-radius:var(--radius-sm);
}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--21x9{aspect-ratio:21/9}
.media-frame--4x5{aspect-ratio:4/5}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--paper{background:#E6DED2;box-shadow:inset 0 0 0 1px rgba(26,24,23,.16)}
.media-frame>img,.media-frame>picture>img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.82) contrast(1.06) brightness(.94) hue-rotate(-4deg);
}
.media-frame--paper>img,.media-frame--paper>picture>img{filter:saturate(.86) contrast(1.04) brightness(1.02)}
.media-frame--fade::after{
  content:"";position:absolute;inset:auto 0 0 0;height:42%;
  background:linear-gradient(to top,rgba(18,16,15,.78),transparent);
  pointer-events:none;
}
.media-frame__tag{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:.42em .8em;
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.1em;
  background:rgba(18,16,15,.84);color:var(--gold);
}
.media-frame--paper .media-frame__tag{background:rgba(242,236,227,.92);color:var(--chu-deep)}
.media-frame__caption{
  margin-top:10px;font-size:.8125rem;letter-spacing:.06em;color:var(--mist);
}

/* ---------- 9. 面包屑 ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:.4em;font-size:.8125rem;color:var(--mist)}
.crumbs li{display:flex;align-items:center;gap:.4em}
.crumbs li+li::before{content:"/";color:rgba(147,163,168,.5)}
.crumbs a{transition:color var(--dur) var(--ease)}
.crumbs a:hover{color:var(--cyan)}

/* ---------- 10. 跳转链接 ---------- */
.skip-link{
  position:fixed;top:-100px;left:50%;transform:translateX(-50%);
  z-index:120;padding:.7em 1.3em;
  background:var(--cyan);color:var(--cyan-ink);
  font-size:.875rem;font-weight:700;border-radius:0 0 10px 10px;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 11. 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  padding-block:12px;padding-inline:var(--gutter);
  transition:padding-block var(--dur) var(--ease);
}
.site-header__inner{
  position:relative;
  display:flex;align-items:center;gap:14px;
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding:8px 10px 8px 16px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  box-shadow:inset 0 0 0 1px var(--line),var(--shadow-1);
  border-radius:var(--radius-pill);
  transition:padding var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.site-header[data-condense]{padding-block:6px}
.site-header[data-condense] .site-header__inner{padding:5px 8px 5px 12px;background:rgba(12,11,10,.9)}
.site-header[data-condense] .brand__tagline{opacity:0;width:0;height:0;overflow:hidden}

.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-width:0}
.brand__mark{
  flex:none;
  padding:.16em .5em .2em;
  background:var(--paper);color:var(--ink);
  font-family:var(--font-mono);font-weight:700;font-size:1.05rem;
  letter-spacing:-.03em;line-height:1;border-radius:6px;
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{font-size:.9375rem;font-weight:700;letter-spacing:.02em;color:#FAF7F2;line-height:1.25;white-space:nowrap}
.brand__tagline{
  font-size:.75rem;font-weight:500;letter-spacing:.1em;color:var(--mist);line-height:1.3;white-space:nowrap;
  transition:opacity var(--dur) var(--ease);
}

.site-nav{flex:1 1 auto;min-width:0;display:flex;justify-content:center}
.nav-list{
  display:flex;align-items:center;gap:2px;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  scroll-behavior:smooth;
}
.nav-list::-webkit-scrollbar{display:none}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;border-radius:var(--radius-pill);
  font-size:.875rem;font-weight:600;letter-spacing:.02em;line-height:1.3;
  color:rgba(242,236,227,.78);white-space:nowrap;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.nav-link:hover{color:var(--white);background:rgba(242,236,227,.07)}
.nav-link[aria-current="page"]{
  color:#FAF7F2;background:rgba(63,224,206,.14);
  box-shadow:inset 0 0 0 1px rgba(63,224,206,.45);
}
.nav-link[aria-current="page"]::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--cyan);flex:none;
}

.site-header__cta{flex:0 0 auto}

.nav-toggle{
  display:none;align-items:center;gap:8px;flex:none;
  padding:9px 14px;border-radius:var(--radius-pill);
  color:var(--paper);font-size:.8125rem;font-weight:600;letter-spacing:.06em;
  box-shadow:inset 0 0 0 1px var(--line-strong);
  transition:color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.nav-toggle:hover{color:var(--cyan);box-shadow:inset 0 0 0 1px var(--cyan)}
.nav-toggle__bars{
  position:relative;width:16px;height:2px;background:currentColor;border-radius:2px;flex:none;
  transition:background-color var(--dur) var(--ease);
}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:currentColor;border-radius:2px;
  transition:transform var(--dur) var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__label{display:inline-block}

.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:70;
  background:rgba(242,236,227,.08);pointer-events:none;
}
.scroll-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--gold));
}

/* ---------- 12. 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  background:var(--ink-2);
  box-shadow:inset 0 1px 0 var(--line);
  padding-block:clamp(48px,7vw,84px) 26px;
  color:rgba(242,236,227,.7);font-size:.9375rem;
}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:5px;
  background:linear-gradient(90deg,var(--chu) 0 38%,var(--gold) 38% 46%,var(--cyan) 46% 54%,var(--teal) 54% 100%);
}
.footer-watermark{
  position:absolute;right:-.05em;bottom:-.36em;z-index:0;
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(9rem,26vw,22rem);line-height:.8;letter-spacing:-.06em;
  color:rgba(242,236,227,.035);
  pointer-events:none;user-select:none;
}
.site-footer .container{position:relative;z-index:1}

.footer-top{
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1.85fr);
  gap:clamp(28px,4vw,56px);
  padding-bottom:clamp(24px,3vw,36px);
}
.footer-brand .brand__mark{font-size:.95rem;padding:.14em .46em .18em}
.footer-sub-line{margin-top:8px;font-family:var(--font-mono);font-size:.75rem;letter-spacing:.14em;color:var(--mist)}
.footer-summary{margin-top:14px;max-width:22em;font-size:1rem;line-height:1.85;color:#DCD4C9}

.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,3vw,36px)}
.footer-col__title{
  margin-bottom:14px;
  font-size:.8125rem;font-weight:700;letter-spacing:.18em;line-height:1.4;
  color:var(--gold);
}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-links a{
  display:inline-block;font-size:.9375rem;line-height:1.6;color:rgba(242,236,227,.72);
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-links a:hover{color:var(--cyan);transform:translateX(3px)}

.footer-meta{
  display:grid;gap:6px;
  padding-block:22px;padding-inline:0;
  border-top:1px solid var(--line);
  font-size:.875rem;color:var(--mist);
}
.footer-contact,.footer-address{max-width:none;line-height:1.8}

.footer-legal{
  display:flex;flex-wrap:wrap;gap:10px 24px;
  align-items:center;justify-content:space-between;
  padding-top:18px;border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:.8125rem;letter-spacing:.02em;
  color:var(--mist);
}

/* ---------- 13. 显现动效 ---------- */
.js-ready [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.js-ready [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1024px){
  .footer-top{grid-template-columns:1fr;gap:32px}
}

@media (max-width:900px){
  .site-header__inner{padding:7px 8px 7px 12px;gap:10px}
  .brand{flex:1 1 auto;min-width:0}
  .site-header__cta{margin-left:auto}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    display:block;
    padding:14px;
    background:rgba(12,11,10,.96);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    box-shadow:inset 0 0 0 1px var(--line),var(--shadow-1);
    border-radius:22px;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  .site-nav[data-open]{opacity:1;visibility:visible;transform:none}

  .nav-list{flex-direction:column;align-items:stretch;gap:4px;overflow:visible}
  .nav-link{justify-content:flex-start;padding:12px 14px;border-radius:14px;font-size:.95rem}
  .nav-link::after{content:"→";margin-left:auto;color:var(--mist);font-size:.875rem}
  .nav-link[aria-current="page"]::after{color:var(--cyan)}
  .site-header[data-condense] .brand__tagline{opacity:1;width:auto;height:auto}

  .grid--2,.grid--3{grid-template-columns:1fr}
  .grid--offset>*:nth-child(even){transform:none}
  .footer-nav{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media (max-width:640px){
  body{font-size:1rem}
  .brand__tagline{display:none}
  .site-header__cta{padding:.46em .8em;font-size:.78rem}
  .nav-toggle__label{display:none}
  .nav-toggle{padding:9px 11px}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:6px}
  .panel--tilt,.panel--tilt:nth-child(even){transform:none}
}

@media (max-width:400px){
  .brand__name{font-size:.875rem}
}

/* ---------- 15. 无障碍 / 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  .js-ready [data-reveal]{opacity:1;transform:none}
  .panel--tilt,.panel--tilt:nth-child(even){transform:none}
  .grid--offset>*:nth-child(even){transform:none}
}