/* =============================================================
   多宝体育竞界 · 全站共享层
   职责：重置、变量、排版、头部、页脚、通用组件
   页面专属布局由各页面 CSS 扩展
   ============================================================= */

/* ---------- 重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(1100px 520px at 88% -8%, rgba(157, 0, 255, 0.16), transparent 60%),
    radial-gradient(880px 480px at 4% 108%, rgba(0, 212, 255, 0.11), transparent 55%),
    linear-gradient(rgba(176, 196, 222, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(176, 196, 222, 0.028) 1px, transparent 1px);
  background-size: auto, auto, 44px 44px, 44px 44px;
  background-position: center top;
  background-attachment: fixed;
}

main {
  flex: 1 0 auto;
}

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

ul,
ol {
  padding-left: 1.25rem;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.2;
  color: var(--color-text);
}

::selection {
  background: rgba(0, 212, 255, 0.32);
  color: #ffffff;
}

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

#main-content,
section[id] {
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

/* ---------- 变量 ---------- */
:root {
  --color-bg: #0a0e27;
  --color-bg-deep: #060a1a;
  --color-bg-card: #1a1e2e;
  --color-bg-card-2: #141827;
  --color-electric: #00d4ff;
  --color-neon: #39ff14;
  --color-fuchsia: #9d00ff;
  --color-hot: #ff4d00;
  --color-text: #f0f4f8;
  --color-text-2: #b0c4de;
  --color-border: rgba(176, 196, 222, 0.16);
  --gradient-sig: linear-gradient(120deg, #00d4ff 0%, #9d00ff 100%);
  --gradient-warm: linear-gradient(120deg, #39ff14 0%, #00d4ff 100%);
  --font-display: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-body: "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Roboto Mono", "Courier New", monospace;
  --header-height: 76px;
  --content-width: 1200px;
  --radius: 4px;
  --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.04), 0 14px 36px rgba(0, 0, 0, 0.32);
  --reveal-delay: 0ms;
}

/* ---------- 动效基础 ---------- */
@keyframes statusPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.82); }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .scroll-progress {
    display: none;
  }
  .status-dot {
    animation: none;
  }
}

/* ---------- 头部 ---------- */
.skip-link {
  position: fixed;
  top: -48px;
  left: 1rem;
  z-index: 500;
  background: var(--color-electric);
  color: var(--color-bg);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 700;
  text-decoration: none;
  padding: 0.55rem 1.1rem;
  border-radius: 0 0 4px 4px;
  transition: top 0.25s ease;
}

.skip-link:focus {
  top: 0;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(10, 14, 39, 0.38);
  border-bottom: 1px solid transparent;
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.site-header[data-scrolled="true"] {
  background: rgba(10, 14, 39, 0.92);
  border-bottom-color: rgba(176, 196, 222, 0.13);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.38);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.55), rgba(157, 0, 255, 0.55), transparent);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.site-header[data-scrolled="true"]::after {
  opacity: 1;
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}

.brand-mark {
  position: relative;
  width: 34px;
  height: 34px;
  background: var(--gradient-sig);
  border-radius: 6px;
  transform: skewX(-6deg);
  filter: drop-shadow(0 0 6px rgba(0, 212, 255, 0.45));
  flex-shrink: 0;
  transition: filter 0.25s ease;
}

.brand-mark::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 13px;
  width: 0;
  height: 0;
  border-left: 11px solid var(--color-bg);
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  transform: skewX(6deg);
}

.site-header__brand:hover .brand-mark {
  filter: drop-shadow(0 0 12px rgba(0, 212, 255, 0.8));
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  transform: skewX(-5deg);
  white-space: nowrap;
}

.brand-name__accent {
  font-family: var(--font-display);
  background: linear-gradient(90deg, #00d4ff, #9d00ff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.site-header__status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--color-text-2);
  text-transform: uppercase;
  border: 1px solid rgba(176, 196, 222, 0.16);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  white-space: nowrap;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-neon);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.75);
  animation: statusPulse 2.2s ease-in-out infinite;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  list-style: none;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 0.5rem 0.85rem;
  font-size: 0.875rem;
  line-height: 1.4;
  color: var(--color-text-2);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.18rem;
  height: 2px;
  background: var(--gradient-sig);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}

.site-nav__link:hover {
  color: var(--color-text);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-electric);
}

.site-header__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.2rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-bg);
  background: var(--gradient-sig);
  text-decoration: none;
  border-radius: 2px;
  white-space: nowrap;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.site-header__cta::after {
  content: "→";
  font-weight: 400;
  transition: transform 0.2s ease;
}

.site-header__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(0, 212, 255, 0.28);
}

.site-header__cta:hover::after {
  transform: translateX(3px);
}

.site-header__toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
  background: rgba(10, 14, 39, 0.6);
  border: 1px solid rgba(176, 196, 222, 0.25);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 0;
  appearance: none;
  -webkit-appearance: none;
}

.toggle-line {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.site-header__toggle[aria-expanded="true"] .toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .toggle-line:nth-child(2) {
  opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

body.no-scroll {
  overflow: hidden;
}

@media (max-width: 1100px) {
  .site-header__status {
    display: none;
  }
  .site-nav {
    gap: 0.75rem;
  }
}

@media (max-width: 980px) {
  .site-header__toggle {
    display: inline-flex;
    margin-left: auto;
    flex-shrink: 0;
  }

  .site-header__inner {
    gap: 1rem;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    z-index: 99;
    margin-left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    padding: 1.25rem 1.5rem 1.5rem;
    background: rgba(10, 14, 39, 0.97);
    border-bottom: 1px solid rgba(176, 196, 222, 0.13);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

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

  .site-nav__item {
    border-bottom: 1px solid rgba(176, 196, 222, 0.08);
  }

  .site-nav__link {
    padding: 0.8rem 0.4rem;
    font-size: 1rem;
  }

  .site-nav__link::after {
    display: none;
  }

  .site-header__cta {
    justify-content: center;
    text-align: center;
    margin-top: 0.5rem;
  }
}

@media (max-width: 560px) {
  :root {
    --header-height: 64px;
  }
  .brand-name {
    font-size: 1rem;
  }
  .brand-mark {
    width: 29px;
    height: 29px;
  }
  .brand-mark::before {
    top: 8px;
    left: 11px;
    border-left-width: 10px;
    border-top-width: 6px;
    border-bottom-width: 6px;
  }
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: auto;
  background: var(--color-bg-deep);
  border-top: 1px solid rgba(176, 196, 222, 0.12);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(0, 212, 255, 0.5) 30%, rgba(157, 0, 255, 0.5) 70%, transparent 100%);
}

.site-footer__inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 3.5rem 1.5rem 0;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 2.75rem;
  padding-bottom: 3rem;
}

.site-footer__brand-block {
  display: grid;
  align-content: start;
  row-gap: 0.2rem;
}

.site-footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--color-text);
}

.brand-mark--footer {
  width: 40px;
  height: 40px;
}

.brand-mark--footer::before {
  top: 11px;
  left: 15px;
  border-left-width: 13px;
  border-top-width: 8px;
  border-bottom-width: 8px;
}

.site-footer__statement {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--color-text-2);
  line-height: 1.6;
}

.site-footer__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.status-chip {
  display: inline-block;
  padding: 0.22rem 0.7rem;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--color-neon);
  background: rgba(57, 255, 20, 0.06);
  border: 1px solid rgba(57, 255, 20, 0.28);
  border-radius: 999px;
  white-space: nowrap;
}

.status-chip--calm {
  color: var(--color-electric);
  background: rgba(0, 212, 255, 0.06);
  border-color: rgba(0, 212, 255, 0.28);
}

.status-chip--hot {
  color: var(--color-hot);
  background: rgba(255, 77, 0, 0.06);
  border-color: rgba(255, 77, 0, 0.3);
}

.site-footer__heading {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-2);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(176, 196, 222, 0.12);
}

.site-footer__list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.site-footer__link {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--color-text-2);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.site-footer__link:hover {
  color: var(--color-electric);
  padding-left: 4px;
}

.site-footer__contact {
  font-size: 0.875rem;
  color: var(--color-text-2);
}

.site-footer__contact-line {
  margin-bottom: 0.35rem;
  line-height: 1.6;
}

.site-footer__contact-phone {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
  font-family: var(--font-body);
  margin-bottom: 0.3rem;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0 1.5rem;
  border-top: 1px solid rgba(176, 196, 222, 0.08);
  font-size: 0.8125rem;
  color: var(--color-text-2);
}

@media (max-width: 1024px) {
  .site-footer__top {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .site-footer__brand-block {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .site-footer__inner {
    padding-top: 2.5rem;
  }
  .site-footer__top {
    grid-template-columns: 1fr;
  }
  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.3rem;
  }
}

/* ---------- 通用容器与章节 ---------- */
.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section {
  position: relative;
  padding-block: clamp(4rem, 8vw, 7rem);
}

.section--tight {
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.section--dim {
  background: var(--color-bg-card-2);
  border-block: 1px solid var(--color-border);
}

.section__head {
  display: grid;
  gap: 0.4rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.section-index {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: rgba(0, 212, 255, 0.42);
  background: linear-gradient(120deg, #00d4ff 15%, #9d00ff 85%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transform: skewX(-6deg);
  transform-origin: left center;
  user-select: none;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4.2vw, 3rem);
  font-weight: 900;
  line-height: 1.15;
  max-width: 20em;
  transform: skewX(-5deg);
  transform-origin: left bottom;
}

.section-lead {
  max-width: 46em;
  font-size: 0.95rem;
  color: var(--color-text-2);
  margin-top: 0.4rem;
}

.eyebrow {
  display: block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-electric);
  margin-bottom: 0.5rem;
}

.page-hero {
  position: relative;
  padding-top: calc(var(--header-height) + clamp(3rem, 7vw, 5.5rem));
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--color-border);
}

.page-hero__inner {
  display: grid;
  gap: 1rem;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  padding: 0;
  margin-bottom: 1.5rem;
  font-size: 0.8125rem;
  color: var(--color-text-2);
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: rgba(176, 196, 222, 0.4);
}

.breadcrumb__link {
  color: var(--color-electric);
  text-decoration: none;
}

.breadcrumb__link:hover {
  text-decoration: underline;
}

.breadcrumb__current {
  color: var(--color-text-2);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.65rem 1.35rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn--primary {
  color: var(--color-bg);
  background: var(--gradient-sig);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 212, 255, 0.28);
}

.btn--ghost {
  color: var(--color-electric);
  background: transparent;
  border-color: rgba(0, 212, 255, 0.42);
}

.btn--ghost:hover {
  border-color: var(--color-electric);
  box-shadow: 0 0 22px rgba(0, 212, 255, 0.18);
  transform: translateY(-2px);
}

/* ---------- 正文容器 ---------- */
.prose {
  max-width: 720px;
  font-size: 0.9375rem;
  color: var(--color-text-2);
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  margin-top: 1.8em;
  margin-bottom: 0.6em;
  transform: skewX(-4deg);
}

.prose h1 {
  font-size: 2rem;
  margin-top: 0;
}

.prose h2 {
  font-size: 1.5rem;
}

.prose h3 {
  font-size: 1.15rem;
}

.prose h4 {
  font-size: 1rem;
}

.prose p {
  margin-bottom: 1.1em;
}

.prose strong {
  color: var(--color-text);
}

.prose a {
  color: var(--color-electric);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.prose a:hover {
  text-decoration-thickness: 2px;
}

.prose ul,
.prose ol {
  margin-bottom: 1.1em;
}

.prose li {
  margin-bottom: 0.45em;
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
}

.grid--cards {
  grid-template-columns: repeat(3, 1fr);
}

.grid__span-3 { grid-column: span 3; }
.grid__span-4 { grid-column: span 4; }
.grid__span-5 { grid-column: span 5; }
.grid__span-6 { grid-column: span 6; }
.grid__span-7 { grid-column: span 7; }
.grid__span-8 { grid-column: span 8; }
.grid__span-12 { grid-column: span 12; }

@media (max-width: 900px) {
  .grid--cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid__span-3,
  .grid__span-4,
  .grid__span-5,
  .grid__span-6,
  .grid__span-7,
  .grid__span-8 {
    grid-column: span 6;
  }
}

@media (max-width: 600px) {
  .grid--cards {
    grid-template-columns: 1fr;
  }
  .grid__span-3,
  .grid__span-4,
  .grid__span-5,
  .grid__span-6,
  .grid__span-7,
  .grid__span-8,
  .grid__span-12 {
    grid-column: span 12;
  }
}

/* ---------- 卡片与面板 ---------- */
.card {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-left: 3px solid transparent;
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.card:hover {
  border-left-color: var(--color-electric);
  transform: translateY(-3px);
}

.card__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.card__text {
  font-size: 0.875rem;
  color: var(--color-text-2);
}

.panel {
  position: relative;
  background: rgba(26, 30, 46, 0.85);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

.panel__label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-2);
  margin-bottom: 0.75rem;
}

.panel__label::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--color-neon);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.8);
}

.metric {
  display: grid;
  gap: 0.2rem;
}

.metric__value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  line-height: 1.05;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.metric__label {
  font-size: 0.8125rem;
  color: var(--color-text-2);
}

/* ---------- 图片容器 ---------- */
.image-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--color-bg-card-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.image-frame--wide {
  aspect-ratio: 21 / 9;
}

.image-frame--portrait {
  aspect-ratio: 3 / 4;
}

.image-frame--square {
  aspect-ratio: 1 / 1;
}

.image-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(135deg, rgba(0, 212, 255, 0.14), rgba(157, 0, 255, 0.1)),
    repeating-linear-gradient(45deg, rgba(176, 196, 222, 0.06) 0 1px, transparent 1px 12px);
  pointer-events: none;
}

.image-frame::after {
  content: "";
  position: absolute;
  inset: 10px;
  z-index: 2;
  border: 1px solid rgba(176, 196, 222, 0.18);
  pointer-events: none;
}

/* ---------- 滚动进度与显现 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: 2px;
  background: var(--gradient-sig);
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
  pointer-events: none;
}

.js-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: var(--reveal-delay, 0ms);
}

.js-enabled [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js-enabled [data-reveal],
  .js-enabled [data-reveal].is-revealed {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}