/* ============================================================
   万象城 ALLWINCITY · 共享站点样式 /assets/site.css
   结构：1 变量 / 2 重置 / 3 排版 / 4 通用组件 / 5 头部 / 6 页脚 / 7 响应式 / 8 动效偏好
   ============================================================ */

/* 1 变量 ------------------------------------------------ */
:root {
  --ink: #0B1B33;
  --ink-2: #102A4A;
  --paper: #F3F6FA;
  --white: #FFFFFF;
  --steel: #53657D;
  --mist: #C8D3E0;
  --coral: #FF6B4A;
  --celadon: #1FB98E;
  --amber: #F4B740;
  --violet: #7A6CF0;

  --grad: linear-gradient(96deg, var(--coral) 0%, var(--amber) 34%, var(--celadon) 68%, var(--violet) 100%);
  --grad-soft: linear-gradient(96deg, rgba(255, 107, 74, .16) 0%, rgba(244, 183, 64, .16) 40%, rgba(31, 185, 142, .16) 72%, rgba(122, 108, 240, .16) 100%);

  --font-display: "Sora", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --w: 1240px;
  --edge: clamp(20px, 4vw, 56px);
  --radius: 2px;

  --c-soft: rgba(200, 211, 224, .22);
  --c-line: rgba(200, 211, 224, .18);
  --c-text-soft: rgba(243, 246, 250, .74);
  --c-text-dim: rgba(200, 211, 224, .58);

  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* 2 重置 ------------------------------------------------ */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; }

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

/* 3 中文排版 -------------------------------------------- */
.display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(48px, 7vw, 112px);
  line-height: .95;
  letter-spacing: -.03em;
}

.h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3vw, 36px);
  line-height: 1.22;
  letter-spacing: -.015em;
}

.h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 1.7vw, 22px);
  line-height: 1.35;
}

.prose { max-width: 34em; font-size: 16.5px; line-height: 1.85; }
.prose p { margin-bottom: 1.15em; }
.prose p:last-child { margin-bottom: 0; }
.prose a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--coral);
  padding-bottom: 1px;
}
.prose a:hover { color: var(--coral); }
.prose strong { font-weight: 700; }
.prose ul { max-width: 34em; }
.prose li {
  position: relative;
  padding-left: 20px;
  margin-bottom: .5em;
  line-height: 1.8;
}
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 2px;
  background: var(--grad);
}

.mono {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  font-weight: 400;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--coral);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--grad);
  flex: none;
}

/* 4 通用组件 -------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--w);
  margin: 0 auto;
  padding-inline: var(--edge);
}

.section { padding-block: clamp(40px, 6vw, 88px); }
.section--tight { padding-block: clamp(26px, 3.4vw, 48px); }
.section--ink {
  background: var(--ink);
  color: var(--paper);
}
.section--ink .eyebrow { color: var(--amber); }
.section--ink .prose a { color: var(--paper); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease), transform .18s var(--ease);
}
.btn--accent {
  background: var(--coral);
  color: #2A0F07;
  font-weight: 600;
}
.btn--accent:hover { background: var(--amber); color: #1F1503; }
.btn--ghost {
  background: transparent;
  border-color: rgba(200, 211, 224, .42);
  color: var(--paper);
}
.btn--ghost:hover { border-color: var(--celadon); color: var(--celadon); }
.btn--dark {
  background: var(--ink);
  color: var(--paper);
}
.btn--dark:hover { background: var(--ink-2); color: var(--amber); }
.btn:active { transform: translateY(1px); }

.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border: 1px solid var(--mist);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--steel);
  background: var(--white);
  white-space: nowrap;
}
.tag--coral { border-color: var(--coral); color: #C43A1F; }
.tag--celadon { border-color: var(--celadon); color: #0E7C5F; }
.tag--amber { border-color: var(--amber); color: #8A5F06; }

.panel {
  position: relative;
  background: var(--white);
  padding: clamp(20px, 3vw, 32px);
  border-radius: var(--radius);
}
.panel--cut {
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}
.panel--ink {
  background: var(--ink-2);
  color: var(--paper);
}

.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* 图片容器基础规则（页面阶段放入 <img>） */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--ink-2) 0%, #1B3A63 58%, #4A3F9E 100%);
  isolation: isolate;
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    135deg,
    rgba(255, 255, 255, .07) 0 1px,
    transparent 1px 11px
  );
  z-index: -1;
}
.media-frame img,
.media-frame picture,
.media-frame video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--3x4 { aspect-ratio: 3 / 4; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--steel);
}
.breadcrumb a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid var(--mist);
  padding-bottom: 1px;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.breadcrumb a:hover { color: var(--coral); border-color: var(--coral); }
.breadcrumb__sep { color: var(--mist); }

/* 筛选按钮：主题筛选，仅过滤当前页面已有内容 */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.filter-btn {
  position: relative;
  padding: 7px 14px 9px;
  border: 1px solid var(--mist);
  border-radius: 999px;
  background: var(--white);
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  cursor: pointer;
  transition: border-color .16s var(--ease), color .16s var(--ease), background-color .16s var(--ease);
}
.filter-btn:hover { border-color: var(--ink); color: var(--ink); }
.filter-btn[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}
.filter-btn[aria-pressed="true"]::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 5px;
  height: 2px;
  background: var(--grad);
}

[data-filter-item][hidden] { display: none !important; }

/* 滚动显现 */
[data-reveal] {
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
[data-reveal].is-pending {
  opacity: 0;
  transform: translateY(14px);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* 5 头部 ------------------------------------------------ */
.skip-link {
  position: absolute;
  left: 10px;
  top: -70px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--amber);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: top .18s var(--ease);
}
.skip-link:focus { top: 10px; }

.site-header {
  position: relative;
  z-index: 60;
  color: var(--white);
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(200, 211, 224, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 211, 224, .045) 1px, transparent 1px);
  background-size: 64px 64px, 64px 64px;
}

.site-header__masthead {
  border-bottom: 1px solid var(--c-soft);
}

.masthead {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(14px, 2.5vw, 34px);
  padding-block: clamp(14px, 1.6vw, 20px);
}

.masthead__brand {
  display: flex;
  align-items: baseline;
  gap: 14px;
  min-width: 0;
}
.masthead__mark {
  width: 12px;
  height: 12px;
  flex: none;
  align-self: center;
  background: var(--grad);
  transform: skewX(-6deg);
}
.masthead__wordmark {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(15px, 1.5vw, 19px);
  letter-spacing: .02em;
  white-space: nowrap;
  color: var(--white);
}
.masthead__tagline {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-text-dim);
  white-space: nowrap;
}
.masthead__utility {
  margin: 0;
  justify-self: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: rgba(200, 211, 224, .68);
  text-align: center;
}
.masthead__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-self: end;
}

.site-header__navbar {
  position: relative;
  background: var(--ink-2);
}
.site-header__navbar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(200, 211, 224, .38) 0 1px,
    transparent 1px 15px
  );
}
.site-header__navbar::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--grad);
  opacity: .9;
  z-index: 1;
}

.nav-bar {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: clamp(12px, 2vw, 28px);
  min-height: 60px;
  padding-bottom: 6px;
}

.primary-nav {
  display: flex;
  align-items: center;
  flex: 1 1 auto;
  min-width: 0;
}

.primary-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: clamp(10px, 1.9vw, 30px);
}

.primary-nav__item {
  display: flex;
  align-items: baseline;
  gap: 7px;
}

.primary-nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .06em;
  color: rgba(200, 211, 224, .46);
  transition: color .16s var(--ease);
}
.primary-nav__item:hover .primary-nav__index { color: var(--celadon); }

.primary-nav__link {
  position: relative;
  display: inline-block;
  padding: 7px 2px;
  color: var(--paper);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  letter-spacing: .02em;
  transition: color .16s var(--ease);
}
.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .22s var(--ease);
}
.primary-nav__link:hover { color: var(--amber); }
.primary-nav__link:hover::after { transform: scaleX(1); }

.primary-nav__link[aria-current="page"] { color: var(--coral); }
.primary-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.nav-bar__meta {
  margin-left: auto;
  color: rgba(200, 211, 224, .5);
  font-size: 10px;
  letter-spacing: .16em;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid rgba(200, 211, 224, .34);
  border-radius: var(--radius);
  background: transparent;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  cursor: pointer;
  transition: border-color .16s var(--ease), color .16s var(--ease);
}
.nav-toggle:hover { border-color: var(--celadon); color: var(--celadon); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform .2s var(--ease), top .2s var(--ease), bottom .2s var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }
.site-header[data-open] .nav-toggle__bars::before {
  top: 4px;
  transform: rotate(45deg);
}
.site-header[data-open] .nav-toggle__bars::after {
  bottom: 4px;
  transform: rotate(-45deg);
}

/* 6 页脚 ------------------------------------------------ */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 110px);
  background-color: var(--ink-2);
  background-image:
    linear-gradient(rgba(200, 211, 224, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 211, 224, .035) 1px, transparent 1px);
  background-size: 72px 72px, 72px 72px;
  color: var(--paper);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad);
}
.site-footer::after {
  content: "";
  position: absolute;
  top: 4px;
  left: 0;
  right: 0;
  height: 8px;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(200, 211, 224, .28) 0 1px,
    transparent 1px 16px
  );
}

.site-footer__inner { padding-block: clamp(46px, 6vw, 84px) 0; }

.footer-lead {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: clamp(26px, 4vw, 64px);
  padding-bottom: clamp(30px, 4vw, 54px);
  border-bottom: 1px solid var(--c-line);
}

.footer-brand-mark {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--celadon);
}
.footer-lead__name {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.1;
  letter-spacing: -.02em;
}
.footer-lead__summary {
  max-width: 42ch;
  color: var(--c-text-soft);
  font-size: 14.5px;
  line-height: 1.85;
}

.footer-contact__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--amber);
}
.footer-contact__list {
  display: grid;
  gap: 12px;
}
.footer-contact__row {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  padding-left: 12px;
  border-left: 2px solid rgba(200, 211, 224, .22);
}
.footer-contact__key {
  flex: none;
  width: 34px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--c-text-dim);
}
.footer-contact__value {
  color: rgba(243, 246, 250, .9);
  font-size: 14px;
  line-height: 1.7;
  word-break: break-all;
}

.copy-btn {
  margin-left: auto;
  padding: 4px 10px;
  border: 1px solid rgba(200, 211, 224, .3);
  border-radius: var(--radius);
  background: transparent;
  color: rgba(243, 246, 250, .78);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  cursor: pointer;
  transition: border-color .16s var(--ease), color .16s var(--ease);
}
.copy-btn:hover { border-color: var(--coral); color: var(--coral); }
.copy-btn[data-copied="true"] { border-color: var(--celadon); color: var(--celadon); }

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
  padding-block: clamp(30px, 4vw, 52px);
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--c-text-dim);
}
.footer-col__title::before {
  content: "";
  width: 14px;
  height: 2px;
  background: var(--grad);
  flex: none;
}

.footer-col__list {
  display: grid;
  gap: 10px;
}

.footer-col__link {
  display: inline-block;
  color: rgba(243, 246, 250, .84);
  font-size: 14.5px;
  text-decoration: none;
  transition: color .16s var(--ease), padding-left .18s var(--ease);
}
.footer-col__link:hover { color: var(--amber); padding-left: 6px; }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px 30px;
  padding-block: 22px clamp(26px, 3vw, 40px);
  border-top: 1px solid var(--c-line);
}
.footer-base__legal {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--c-text-dim);
  line-height: 1.8;
}
.footer-base__note {
  max-width: 52ch;
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(200, 211, 224, .52);
}

/* 7 响应式 ---------------------------------------------- */
@media (max-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .masthead__utility { display: none; }
  .masthead { grid-template-columns: minmax(0, 1fr) auto; }
}

@media (max-width: 880px) {
  .nav-toggle { display: inline-flex; }
  .nav-bar {
    flex-wrap: wrap;
    gap: 10px;
    min-height: 54px;
    padding-block: 8px 12px;
  }
  .nav-bar__meta { display: none; }

  .primary-nav {
    display: block;
    flex: 0 0 100%;
    order: 3;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .26s var(--ease), opacity .2s var(--ease);
  }
  .site-header[data-open] .primary-nav {
    max-height: 70vh;
    opacity: 1;
    overflow-y: auto;
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 4px 0 12px;
  }
  .primary-nav__item {
    border-bottom: 1px solid rgba(200, 211, 224, .14);
    padding: 2px 0;
  }
  .primary-nav__link {
    display: block;
    padding: 12px 2px;
    font-size: 15px;
  }
  .primary-nav__link::after { display: none; }
  .primary-nav__link[aria-current="page"] {
    padding-left: 10px;
    box-shadow: inset 3px 0 0 var(--coral);
  }

  .footer-lead { grid-template-columns: minmax(0, 1fr); }
  .grid--2 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 720px) {
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-base { flex-direction: column; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .masthead__tagline { display: none; }
  .masthead__brand { gap: 10px; }
  .btn { padding: 9px 14px; font-size: 11px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .footer-contact__key { width: 30px; }
  .copy-btn { margin-left: 0; }
}

/* 8 动效偏好 -------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal],
  [data-reveal].is-pending {
    opacity: 1 !important;
    transform: none !important;
  }
}