/* ==========================================================================
   2026看台 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 栅格 / 基础组件
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root {
  --c-950: #030A14;
  --c-900: #05101F;
  --c-700: #0C203A;
  --c-500: #16375C;
  --c-grey: #8FA9C8;
  --c-white: #F2F6FB;
  --c-body: #D7E3F2;
  --c-orange: #FF6A18;
  --c-orange-2: #FFB37A;
  --c-green: #33D07A;
  --c-purple: #8A6BFF;
  --c-ripple: #1E4E7A;

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

  --shell: 1440px;
  --gutter: clamp(16px, 3vw, 40px);
  --header-h: 76px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --pill: 999px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

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

body {
  margin: 0;
  background-color: var(--c-900);
  color: var(--c-white);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 赣江波纹 —— 低透明度斜向条纹，仅作背景纹理 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image: repeating-linear-gradient(
    104deg,
    rgba(30, 78, 122, 0.22) 0 1px,
    transparent 1px 22px
  );
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 34%, #000 76%, transparent 100%);
  mask-image: linear-gradient(180deg, transparent 0%, #000 34%, #000 76%, transparent 100%);
}

img, svg, video { display: block; max-width: 100%; height: auto; }

a { color: var(--c-orange-2); text-decoration: none; }
a:hover { color: var(--c-orange); }

button, input, select, textarea { font: inherit; color: inherit; }

ul, ol { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4, p, figure, dl, dd { margin: 0; }

:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 语言与排版工具 ---------- */
.tk-sr {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.tk-num,
.tk-header__date,
.tk-header__sync,
.tk-index__num,
.tk-card__meta,
.tk-breadcrumb {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.tk-h1 {
  font-size: clamp(40px, 6.4vw, 92px);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--c-white);
}

.tk-h2 {
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--c-white);
}

.tk-h3 {
  font-size: clamp(19px, 1.7vw, 24px);
  line-height: 1.3;
  font-weight: 800;
  color: var(--c-white);
}

.tk-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-orange);
  text-transform: uppercase;
}

.tk-prose {
  max-width: 68ch;
  font-size: clamp(16px, 1.05vw, 17.5px);
  line-height: 1.75;
  color: var(--c-body);
}

.tk-prose p + p { margin-top: 1.1em; }
.tk-prose strong { color: var(--c-white); font-weight: 700; }

.tk-annotation {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--c-grey);
  text-transform: uppercase;
}

/* ---------- 骨架 ---------- */
.tk-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.tk-main {
  position: relative;
  z-index: 1;
  display: block;
  min-height: 60vh;
  padding-top: var(--header-h);
}

.tk-main--overlay { padding-top: 0; }

.tk-section { padding: clamp(56px, 8vw, 120px) 0; }

.tk-split {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: clamp(24px, 3.2vw, 56px);
  align-items: start;
}

.tk-split--home { grid-template-columns: minmax(0, 38fr) minmax(0, 62fr); }
.tk-split--product { grid-template-columns: minmax(0, 24fr) minmax(0, 76fr); }
.tk-split--faq { grid-template-columns: minmax(0, 30fr) minmax(0, 70fr); }

.tk-rail {
  position: sticky;
  top: calc(var(--header-h) + 28px);
  align-self: start;
}

.tk-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 1.6vw, 24px);
}

.tk-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.tk-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.tk-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 跳转链接 ---------- */
.tk-skip {
  position: absolute;
  left: 12px;
  top: -70px;
  z-index: 90;
  padding: 11px 20px;
  background: var(--c-orange);
  color: #08111F;
  font-size: 14px;
  font-weight: 700;
  border-radius: 0 0 12px 12px;
  transition: top 0.2s var(--ease);
}

.tk-skip:focus { top: 0; color: #08111F; }

/* ==========================================================================
   头部
   ========================================================================== */
.tk-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(5, 16, 31, 0.86) 0%, rgba(5, 16, 31, 0) 100%);
  border-bottom: 1px solid transparent;
  transition: background-color 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.tk-header.is-solid {
  background: rgba(5, 16, 31, 0.94);
  border-bottom-color: var(--c-500);
  box-shadow: 0 14px 36px rgba(3, 10, 20, 0.55);
}

.tk-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 32px);
  min-height: var(--header-h);
}

.tk-header__meta {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1px;
  padding-left: clamp(10px, 1.4vw, 22px);
  border-left: 1px solid var(--c-500);
  font-size: 11px;
  line-height: 1.5;
  color: var(--c-grey);
  white-space: nowrap;
}

.tk-header__date { color: var(--c-white); letter-spacing: 0.04em; }

.tk-header__sync { display: inline-flex; align-items: center; gap: 6px; }
.tk-header__sync b { color: var(--c-green); font-weight: 600; }

.tk-sync-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 0 3px rgba(51, 208, 122, 0.16);
  animation: tk-pulse 2.4s ease-in-out infinite;
}

@keyframes tk-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 3px rgba(51, 208, 122, 0.16); }
  50% { opacity: 0.55; box-shadow: 0 0 0 7px rgba(51, 208, 122, 0); }
}

/* --- 品牌 --- */
.tk-brand {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.tk-brand__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--c-white);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1;
  text-decoration: none;
}

.tk-brand__link:hover { color: var(--c-white); }

.tk-brand__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  color: var(--c-orange);
  letter-spacing: -0.04em;
}

.tk-brand__name { font-size: 20px; }

.tk-brand__link--foot .tk-brand__num,
.tk-brand__link--foot .tk-brand__name { font-size: 24px; }

.tk-brand__status {
  display: none;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  height: 38px;
  padding-left: 7px;
  border-left: 1px solid var(--c-500);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  line-height: 1;
  color: var(--c-grey);
}

/* --- 导航 --- */
.tk-nav { margin-left: auto; }

.tk-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(2px, 0.7vw, 10px);
}

.tk-nav__item { display: block; }

.tk-nav__link {
  position: relative;
  display: inline-block;
  padding: 9px 13px;
  border-radius: var(--pill);
  font-size: 15px;
  font-weight: 500;
  color: var(--c-grey);
  text-decoration: none;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.tk-nav__link:hover {
  color: var(--c-white);
  background: rgba(22, 55, 92, 0.6);
}

.tk-nav__link[aria-current="page"] { color: var(--c-white); font-weight: 700; }

.tk-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 13px; right: 13px; bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-orange);
  transform-origin: center;
  animation: tk-underline 0.3s var(--ease) both;
}

@keyframes tk-underline {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* --- 汉堡按钮 --- */
.tk-burger {
  display: none;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  margin-left: auto;
  padding: 8px 16px;
  border: 1px solid var(--c-500);
  border-radius: var(--pill);
  background: rgba(12, 32, 58, 0.7);
  color: var(--c-white);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.tk-burger:hover { border-color: var(--c-orange); }

.tk-burger__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-white);
  transition: background-color 0.18s var(--ease);
}

.tk-burger__bars::before,
.tk-burger__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-white);
  transition: transform 0.22s var(--ease), top 0.22s var(--ease);
}

.tk-burger__bars::before { top: -6px; }
.tk-burger__bars::after { top: 6px; }

.tk-header[data-open] .tk-burger__bars { background-color: transparent; }
.tk-header[data-open] .tk-burger__bars::before { top: 0; transform: rotate(45deg); }
.tk-header[data-open] .tk-burger__bars::after { top: 0; transform: rotate(-45deg); }

/* --- 滚动进度 --- */
.tk-progress {
  height: 2px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--c-orange) 0%, var(--c-purple) 100%);
  will-change: transform;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.tk-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(64px, 10vw, 140px);
  background: linear-gradient(180deg, var(--c-950) 0%, var(--c-900) 100%);
  border-top: 1px solid var(--c-500);
  overflow: hidden;
}

.tk-footer__band {
  position: absolute;
  top: -3px;
  left: -6%;
  width: 112%;
  height: 6px;
  background: linear-gradient(90deg, var(--c-orange) 0%, var(--c-purple) 55%, var(--c-green) 100%);
  transform: rotate(-1.2deg);
  transform-origin: left center;
  pointer-events: none;
}

.tk-ripple {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.85;
  background-image: repeating-linear-gradient(
    100deg,
    rgba(30, 78, 122, 0.28) 0 1px,
    transparent 1px 18px
  );
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 26%, #000 100%);
  mask-image: linear-gradient(180deg, transparent 0%, #000 26%, #000 100%);
}

.tk-footer__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 1fr 1.05fr;
  gap: clamp(28px, 4vw, 64px);
  padding-top: clamp(52px, 7vw, 92px);
  padding-bottom: clamp(36px, 5vw, 64px);
}

.tk-footer__col { min-width: 0; }

.tk-footer__col--brand { display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }

.tk-footer__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--c-grey);
}

.tk-footer__note {
  max-width: 30ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-body);
}

.tk-footer__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-grey);
}

.tk-footer__legal-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(22, 55, 92, 0.75);
}

.tk-footer__legal-link {
  font-size: 13px;
  color: var(--c-grey);
}

.tk-footer__legal-link:hover { color: var(--c-orange-2); }

.tk-footer__legal {
  position: relative;
  z-index: 1;
  padding: 18px var(--gutter) 26px;
  border-top: 1px solid rgba(22, 55, 92, 0.75);
  text-align: center;
}

.tk-footer__legal-text {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--c-grey);
}

/* --- 联系信息 --- */
.tk-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tk-contact__row { display: flex; flex-direction: column; gap: 2px; }

.tk-contact__key {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--c-grey);
}

.tk-contact__val {
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-white);
  word-break: break-word;
}

a.tk-contact__val { color: var(--c-white); }
a.tk-contact__val:hover { color: var(--c-orange-2); }

/* ==========================================================================
   索引（编辑部目录）
   ========================================================================== */
.tk-index { display: flex; flex-direction: column; }

.tk-index__item { display: block; }

.tk-index__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 6px;
  border-top: 1px solid rgba(22, 55, 92, 0.8);
  color: var(--c-white);
  transition: background-color 0.18s var(--ease), padding-left 0.18s var(--ease);
}

.tk-index__item:last-child .tk-index__link { border-bottom: 1px solid rgba(22, 55, 92, 0.8); }

.tk-index__link:hover {
  background: rgba(22, 55, 92, 0.5);
  padding-left: 14px;
  color: var(--c-white);
}

.tk-index__num {
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-orange);
}

.tk-index__body {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.tk-index__label { font-size: 14.5px; font-weight: 600; line-height: 1.35; }

.tk-index__desc { font-size: 11.5px; line-height: 1.4; color: var(--c-grey); }

.tk-index__arrow {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-500);
  transition: transform 0.18s var(--ease), color 0.18s var(--ease);
}

.tk-index__link:hover .tk-index__arrow { color: var(--c-orange); transform: translateX(4px); }

/* ==========================================================================
   基础组件
   ========================================================================== */
.tk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 12px 26px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.tk-btn--primary { background: var(--c-orange); color: #08111F; }
.tk-btn--primary:hover { background: var(--c-orange-2); color: #08111F; transform: translateY(-1px); }

.tk-btn--ghost { border-color: var(--c-500); color: var(--c-white); background: transparent; }
.tk-btn--ghost:hover { border-color: var(--c-orange); color: var(--c-orange-2); }

.tk-btn--sm { min-height: 40px; padding: 9px 18px; font-size: 13.5px; }

.tk-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 17px;
  border: 1px solid var(--c-500);
  border-radius: var(--pill);
  background: rgba(12, 32, 58, 0.66);
  color: var(--c-grey);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.tk-pill:hover { color: var(--c-white); border-color: var(--c-orange-2); }

.tk-pill.is-active,
.tk-pill[aria-selected="true"] {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: #08111F;
}

.tk-seg {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--c-500);
  border-radius: var(--pill);
  background: rgba(12, 32, 58, 0.6);
}

.tk-seg__btn {
  min-height: 36px;
  padding: 7px 18px;
  border: 0;
  border-radius: var(--pill);
  background: transparent;
  color: var(--c-grey);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.tk-seg__btn:hover { color: var(--c-white); }
.tk-seg__btn[aria-selected="true"] { background: var(--c-orange); color: #08111F; }

.tk-tabs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  border-bottom: 1px solid var(--c-500);
  scrollbar-width: thin;
}

.tk-tabs__btn {
  position: relative;
  flex: 0 0 auto;
  padding: 12px 18px;
  border: 0;
  background: transparent;
  color: var(--c-grey);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.18s var(--ease);
}

.tk-tabs__btn:hover { color: var(--c-white); }
.tk-tabs__btn[aria-selected="true"] { color: var(--c-white); }

.tk-tabs__btn[aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 18px; right: 18px; bottom: -1px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-orange);
  transform-origin: center;
  animation: tk-underline 0.3s var(--ease) both;
}

.tk-tabs__panel { padding-top: clamp(20px, 3vw, 32px); }
[data-tab-panel][hidden] { display: none; }
[data-tab-panel].is-anim { animation: tk-fade 0.18s var(--ease) both; }

@keyframes tk-fade {
  from { opacity: 0; transform: translateX(8px); }
  to { opacity: 1; transform: none; }
}

.tk-acc { border-top: 1px solid var(--c-500); }

.tk-acc__item { border-bottom: 1px solid var(--c-500); }

.tk-acc__item > summary {
  position: relative;
  padding: 18px 52px 18px 2px;
  font-size: 17px;
  font-weight: 600;
  color: var(--c-white);
  cursor: pointer;
  list-style: none;
}

.tk-acc__item > summary::-webkit-details-marker { display: none; }

.tk-acc__item > summary::after {
  content: "+";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--c-orange);
  transition: transform 0.22s var(--ease);
}

.tk-acc__item[open] > summary::after { content: "–"; }

.tk-acc__body {
  padding: 0 52px 22px 2px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-body);
}

.tk-card {
  padding: clamp(18px, 2vw, 26px);
  border: 1px solid var(--c-500);
  border-radius: var(--radius-md);
  background: rgba(12, 32, 58, 0.55);
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.tk-card:hover { border-color: var(--c-orange-2); background: rgba(22, 55, 92, 0.5); }

.tk-card__meta {
  display: block;
  margin-bottom: 10px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-grey);
}

.tk-card__title { font-size: 17px; font-weight: 700; line-height: 1.4; color: var(--c-white); }

.tk-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--pill);
  border: 1px solid var(--c-500);
  font-size: 11.5px;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--c-grey);
}

.tk-tag--green { border-color: rgba(51, 208, 122, 0.5); color: var(--c-green); }
.tk-tag--purple { border-color: rgba(138, 107, 255, 0.5); color: var(--c-purple); }

/* 框景 */
.tk-frame {
  position: relative;
  padding: clamp(20px, 3vw, 44px);
  border: 1px solid var(--c-500);
  border-radius: var(--radius-lg);
}

.tk-frame::before,
.tk-frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 2px solid var(--c-orange);
  pointer-events: none;
}

.tk-frame::before {
  top: -2px; left: -2px;
  border-right: 0; border-bottom: 0;
  border-radius: var(--radius-lg) 0 0 0;
}

.tk-frame::after {
  bottom: -2px; right: -2px;
  border-left: 0; border-top: 0;
  border-radius: 0 0 var(--radius-lg) 0;
}

.tk-frame__inner { position: relative; }

/* 横向主题带 */
.tk-band {
  display: flex;
  gap: 10px;
  padding: 2px 2px 14px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.tk-band::-webkit-scrollbar { height: 6px; }
.tk-band::-webkit-scrollbar-thumb { background: var(--c-500); border-radius: 3px; }

/* 面包屑 */
.tk-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-grey);
}

.tk-breadcrumb a { color: var(--c-grey); }
.tk-breadcrumb a:hover { color: var(--c-orange-2); }
.tk-breadcrumb__sep { color: var(--c-500); }
.tk-breadcrumb__current { color: var(--c-white); }

/* 图片容器 */
.tk-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--c-500);
  border-radius: var(--radius-md);
  background: var(--c-700);
}

.tk-figure img,
.tk-figure__media {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.tk-figure__media--wide { aspect-ratio: 21 / 9; }
.tk-figure__media--tall { aspect-ratio: 3 / 4; }
.tk-figure__media--square { aspect-ratio: 1 / 1; }

.tk-figure__cap {
  padding: 12px 16px;
  border-top: 1px solid var(--c-500);
  font-size: 12px;
  line-height: 1.5;
  color: var(--c-grey);
}

/* ---------- 显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
}

[data-reveal].is-in { opacity: 1; transform: none; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1200px) {
  .tk-brand__status { display: none; }
}

@media (max-width: 1024px) {
  .tk-split,
  .tk-split--home,
  .tk-split--product,
  .tk-split--faq { grid-template-columns: minmax(0, 1fr); }

  .tk-rail { position: static; }

  .tk-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tk-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .tk-footer__grid { grid-template-columns: 1fr 1fr; }
  .tk-footer__col--contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .tk-header__meta { display: none; }

  .tk-burger { display: inline-flex; }

  .tk-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-left: 0;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    background: var(--c-700);
    border-top: 1px solid var(--c-500);
    border-bottom: 1px solid var(--c-500);
    box-shadow: 0 24px 48px rgba(3, 10, 20, 0.6);
    transition: max-height 0.28s var(--ease), visibility 0.28s var(--ease);
  }

  .tk-header[data-open] .tk-nav {
    max-height: 72vh;
    overflow-y: auto;
    visibility: visible;
  }

  .tk-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 0 12px;
  }

  .tk-nav__link {
    display: block;
    padding: 15px var(--gutter);
    border-radius: 0;
    border-bottom: 1px solid rgba(22, 55, 92, 0.6);
    font-size: 17px;
    min-height: 44px;
  }

  .tk-nav__link[aria-current="page"] {
    background: rgba(255, 106, 24, 0.1);
    padding-left: calc(var(--gutter) + 8px);
  }

  .tk-nav__link[aria-current="page"]::after {
    left: var(--gutter);
    right: auto;
    bottom: 12px;
    width: 22px;
  }
}

@media (max-width: 700px) {
  :root { --header-h: 64px; }

  .tk-brand__num,
  .tk-brand__name { font-size: 18px; }

  .tk-grid--2,
  .tk-grid--3,
  .tk-grid--4 { grid-template-columns: minmax(0, 1fr); }

  .tk-footer__grid { grid-template-columns: 1fr; }

  .tk-frame { padding: 20px; }
}

/* ==========================================================================
   动效降级
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .tk-sync-dot { animation: none; }

  [data-reveal] { opacity: 1 !important; transform: none !important; }

  [data-tab-panel].is-anim { animation: none; }
}