/* ============================================================
   components.css — 可复用组件：导航、按钮、卡片、标签、页脚
   ============================================================ */

/* ============================================================
   顶部导航
   ============================================================ */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease),
              backdrop-filter 0.3s var(--ease);
}

/* 页面向下滚动后由 JS 加上 .is-scrolled */
.site-header.is-scrolled {
  background: rgba(8, 9, 13, 0.78);
  border-bottom-color: var(--border);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
}

/* ---------- 品牌标志 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 18px rgba(79, 140, 255, 0.35);
}

.brand__mark svg { width: 17px; height: 17px; }

.brand__name { font-size: var(--fs-sm); }

.brand__sub {
  color: var(--text-dim);
  font-size: var(--fs-xs);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.brand:hover .brand__name { color: #fff; }

/* ---------- 导航链接 ---------- */
.nav {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
}

.nav__link {
  position: relative;
  padding-block: var(--sp-2);
  color: var(--text-muted);
  font-size: var(--fs-sm);
  font-weight: 500;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.nav__link:hover { color: var(--text); }
.nav__link:hover::after { transform: scaleX(1); }

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

/* ---------- 汉堡按钮（移动端） ---------- */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.03);
  padding: 0;
  place-items: center;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 2px auto;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }

/* ============================================================
   按钮
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: var(--r-full);
  font-size: var(--fs-sm);
  font-weight: 600;
  white-space: nowrap;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease),
              border-color 0.25s var(--ease), box-shadow 0.25s var(--ease),
              color 0.25s var(--ease);
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(120deg, var(--accent), #6aa2ff);
  color: #fff;
  box-shadow: 0 10px 30px rgba(79, 140, 255, 0.28);
}

.btn--primary:hover {
  box-shadow: 0 16px 38px rgba(79, 140, 255, 0.42);
}

.btn--ghost {
  border-color: var(--border-strong);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.btn--ghost:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
}

.btn--sm { padding: 9px 18px; font-size: var(--fs-xs); }

.btn__arrow { transition: transform 0.25s var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }

/* 文字链接（带箭头） */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  color: var(--accent);
  font-size: var(--fs-sm);
  font-weight: 600;
}

.link-arrow svg { transition: transform 0.25s var(--ease); }
.link-arrow:hover svg { transform: translateX(4px); }
.link-arrow:hover { color: var(--accent-2); }

/* ============================================================
   标签 / 徽章
   ============================================================ */

.chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 15px;
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  font-size: var(--fs-xs);
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease),
              background 0.25s var(--ease);
}

.chip:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--text);
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border: 1px solid var(--accent-line);
  border-radius: var(--r-full);
  background: rgba(8, 9, 13, 0.72);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: #cfe0ff;
  font-size: 12px;
  font-weight: 500;
}

/* ============================================================
   卡片
   ============================================================ */

.card {
  position: relative;
  padding: var(--sp-6);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease),
              background 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-line);
  background: var(--surface-2);
  box-shadow: var(--sh-glow);
}

.card__icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: var(--sp-5);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--accent-soft);
  color: var(--accent-2);
}

.card__icon svg { width: 20px; height: 20px; }

.card__title {
  margin-bottom: var(--sp-3);
  font-size: var(--fs-md);
}

.card__desc {
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

/* ============================================================
   作品卡片
   ============================================================ */

.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}

.work-card {
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease),
              box-shadow 0.35s var(--ease);
}

.work-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-line);
  box-shadow: var(--sh-glow);
}

.work-card__link { display: block; }

/* 占位缩略图：纯 CSS 渐变，锁定 16:10，换成真图不跳版 */
.thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--surface-2);
}

/* ---------- 换成真实图片后自动生效 ----------
   img 填满容器并按需裁切，源图比例和 16:10 不一致也不会被拉伸变形；
   :has(img) 负责关掉占位用的网格与底部渐变遮罩——
   否则那层遮罩会盖在照片上，把图片下缘压暗。 */
.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.thumb:has(img)::before,
.thumb:has(img)::after {
  display: none;
}

.thumb::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.6;
}

.thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(8, 9, 13, 0.7) 100%);
}

.thumb--1 { background: radial-gradient(120% 100% at 20% 10%, rgba(79, 140, 255, 0.55), transparent 55%), linear-gradient(140deg, #101a33, #0a0d18); }
.thumb--2 { background: radial-gradient(120% 100% at 80% 15%, rgba(34, 211, 238, 0.42), transparent 55%), linear-gradient(140deg, #0d2430, #0a0f16); }
.thumb--3 { background: radial-gradient(120% 100% at 50% 0%, rgba(139, 122, 255, 0.48), transparent 55%), linear-gradient(140deg, #1a1433, #0b0a14); }

/* 缩略图里的装饰线条，模拟界面感 */
.thumb__art {
  position: absolute;
  left: 12%;
  right: 12%;
  bottom: 0;
  height: 58%;
  border-radius: 10px 10px 0 0;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-bottom: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.02));
  display: grid;
  align-content: start;
  gap: 7px;
  padding: 12px;
  transition: transform 0.45s var(--ease);
}

.thumb__art span {
  display: block;
  height: 7px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.16);
}

.thumb__art span:nth-child(1) { width: 42%; background: rgba(255, 255, 255, 0.3); }
.thumb__art span:nth-child(2) { width: 78%; }
.thumb__art span:nth-child(3) { width: 62%; }
.thumb__art span:nth-child(4) { width: 86%; }

.work-card:hover .thumb__art { transform: translateY(-8px); }

.thumb__badge {
  position: absolute;
  top: var(--sp-4);
  left: var(--sp-4);
  z-index: 2;
  padding: 5px 11px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-full);
  background: rgba(8, 9, 13, 0.6);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: #dbe4f5;
  font-size: 12px;
}

.work-card__body { padding: var(--sp-5); }

.work-card__title {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-md);
}

.work-card__title svg {
  width: 15px;
  height: 15px;
  color: var(--text-dim);
  transition: transform 0.3s var(--ease), color 0.3s var(--ease);
}

.work-card:hover .work-card__title svg {
  color: var(--accent);
  transform: translate(3px, -3px);
}

.work-card__desc {
  margin-top: var(--sp-3);
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

.work-card__meta {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-top: var(--sp-4);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
}

.work-card__meta span + span::before {
  content: "·";
  margin-right: var(--sp-3);
  color: var(--border-strong);
}

/* ============================================================
   页脚
   ============================================================ */

.site-footer {
  padding-block: var(--sp-8) var(--sp-6);
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
}

.footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--sp-7);
  padding-bottom: var(--sp-7);
}

.footer__about {
  max-width: 34ch;
  margin-top: var(--sp-4);
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

.footer__title {
  margin-bottom: var(--sp-4);
  color: var(--text-dim);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer__list { display: grid; gap: var(--sp-3); }

.footer__list a {
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

.footer__list a:hover { color: var(--accent); }

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: var(--fs-xs);
}

/* ============================================================
   响应式
   ============================================================ */

@media (max-width: 900px) {
  .nav-toggle { display: grid; }

  /* 移动端抽屉菜单 */
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--sp-5);
    padding: var(--sp-6) var(--gutter) var(--sp-7);
    border-bottom: 1px solid var(--border);
    background: rgba(10, 11, 16, 0.97);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease),
                visibility 0.3s var(--ease);
  }

  .nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav__list li + li { border-top: 1px solid var(--border); }

  .nav__link {
    display: block;
    padding-block: var(--sp-4);
    font-size: var(--fs-md);
  }

  .nav__link::after { display: none; }
  .nav__cta { align-self: flex-start; }

  .work-grid { grid-template-columns: repeat(2, 1fr); }
  .footer__top { grid-template-columns: 1fr 1fr; gap: var(--sp-6); }
  .footer__brand-col { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .work-grid { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; }
  .brand__sub { display: none; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* ============================================================
   面包屑
   ============================================================ */

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
  font-size: var(--fs-xs);
}

.crumbs li {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  color: var(--text-dim);
}

.crumbs li + li::before {
  content: "/";
  color: var(--border-strong);
}

.crumbs a { color: var(--text-dim); }
.crumbs a:hover { color: var(--accent); }
.crumbs [aria-current="page"] { color: var(--text-muted); }

/* ============================================================
   标签筛选栏
   ============================================================ */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: var(--sp-6);
  padding-bottom: var(--sp-5);
  border-bottom: 1px solid var(--border);
}

.filter-bar__btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  font-size: var(--fs-xs);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease),
              color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.filter-bar__btn:hover {
  border-color: var(--accent-line);
  color: var(--text);
}

.filter-bar__btn.is-active {
  border-color: transparent;
  background: linear-gradient(120deg, var(--accent), #6aa2ff);
  color: #fff;
  box-shadow: 0 6px 18px rgba(79, 140, 255, 0.26);
}

/* 筛选后无结果时的提示 */
.filter-empty {
  padding: var(--sp-9) var(--sp-4);
  color: var(--text-muted);
  font-size: var(--fs-md);
  text-align: center;
}

/* ============================================================
   更多占位缩略图配色
   ============================================================ */

.thumb--4 { background: radial-gradient(120% 100% at 25% 95%, rgba(255, 145, 80, 0.40), transparent 55%), linear-gradient(140deg, #241a12, #0f0c0a); }
.thumb--5 { background: radial-gradient(120% 100% at 75% 5%, rgba(94, 234, 212, 0.34), transparent 55%), linear-gradient(140deg, #0b2220, #090f14); }
.thumb--6 { background: radial-gradient(120% 100% at 25% 20%, rgba(244, 114, 182, 0.34), transparent 55%), linear-gradient(140deg, #24102a, #0d0a14); }

/* ============================================================
   结果数据卡（案例页）
   ============================================================ */

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}

.result {
  padding: var(--sp-6);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
}

.result__num {
  font-size: var(--fs-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.result__label {
  margin-top: var(--sp-2);
  color: var(--text-muted);
  font-size: var(--fs-sm);
  line-height: 1.6;
}

@media (max-width: 640px) {
  .result-grid { grid-template-columns: 1fr; }
  .filter-bar { gap: var(--sp-2); }
}