/* ==========================================================================
   IM 电竞站 · Ascent Call — /assets/site.css
   共享层：reset / 变量 / 中文排版 / 命令栏 / 页脚 / 通用组件
   ========================================================================== */

:root {
  --im-ink: #060A16;
  --im-panel: #0B1226;
  --im-lift: #121D3A;
  --im-line: #26365E;
  --im-white: #F6F8FF;
  --im-body: #AFBBD8;
  --im-muted: #7F8BAA;
  --im-accent: #37F5C4;
  --im-accent-soft: #B9FFF0;
  --im-rose: #FF6B9D;

  --im-display: "Archivo Black", "Noto Sans SC", system-ui, sans-serif;
  --im-sans: "Noto Sans SC", "Source Han Sans SC", system-ui, sans-serif;
  --im-mono: "IBM Plex Mono", ui-monospace, monospace;

  --im-radius: 26px;
  --im-radius-sm: 12px;
  --im-max: 1200px;
  --im-gutter: clamp(18px, 4vw, 44px);
  --im-ease: cubic-bezier(.22, .7, .28, 1);
}

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

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

body {
  margin: 0;
  min-height: 100%;
  font-family: var(--im-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  color: var(--im-body);
  background-color: var(--im-ink);
  background-image:
    linear-gradient(rgba(38, 54, 94, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38, 54, 94, .16) 1px, transparent 1px);
  background-size: 96px 96px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 .6em;
  font-family: var(--im-display);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--im-white);
}

h1 { font-size: clamp(2.4rem, 6vw, 4.6rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); letter-spacing: -.01em; }

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--im-accent); text-decoration: none; }
a:hover { color: var(--im-accent-soft); }

ul, ol { margin: 0 0 1.1em; padding-left: 1.25em; }
li { margin-bottom: .35em; }

strong, b { color: var(--im-white); font-weight: 700; }

code, kbd, samp, pre {
  font-family: var(--im-mono);
  font-size: .92em;
}

small { font-size: 12px; color: var(--im-muted); }

hr {
  border: 0;
  height: 1px;
  background: var(--im-line);
  margin: 2rem 0;
}

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

button { font: inherit; color: inherit; }

:focus-visible {
  outline: 2px solid var(--im-accent-soft);
  outline-offset: 3px;
  border-radius: 6px;
}

#main-content:focus { outline: none; }

/* ---------- 布局原子 ---------- */

.im-container {
  width: min(100% - var(--im-gutter) * 2, var(--im-max));
  margin-inline: auto;
}

.im-container--narrow { max-width: 860px; }

.im-section {
  position: relative;
  padding: clamp(48px, 7vw, 96px) 0;
}

.im-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: clamp(24px, 3vw, 40px);
}

.im-grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

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

.im-rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, var(--im-line), transparent);
}

/* ---------- 跳过链接 ---------- */

.im-skip {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 11px 18px;
  border-radius: 10px;
  background: var(--im-accent);
  color: var(--im-ink);
  font: 700 14px/1 var(--im-sans);
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform .24s var(--im-ease);
}

.im-skip:focus,
.im-skip:focus-visible {
  transform: translateY(0);
  color: var(--im-ink);
}

/* ---------- 命令栏 ---------- */

.im-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(6, 10, 22, .94);
  border-bottom: 1px solid var(--im-line);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: background-color .28s var(--im-ease), box-shadow .28s var(--im-ease);
}

.im-header[data-scrolled] {
  background: rgba(6, 10, 22, .99);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .55);
}

.im-alert {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px clamp(16px, 4vw, 44px);
  font: 600 11px/1.5 var(--im-mono);
  letter-spacing: .08em;
  color: var(--im-body);
  background: linear-gradient(90deg, rgba(255, 107, 157, .18), rgba(255, 107, 157, .04) 58%, transparent);
  border-bottom: 1px solid rgba(255, 107, 157, .18);
}

.im-alert__dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--im-rose);
  box-shadow: 0 0 0 3px rgba(255, 107, 157, .16);
}

.im-alert__text {
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.im-alert__link {
  margin-left: auto;
  flex: 0 0 auto;
  color: var(--im-rose);
  border-bottom: 1px solid transparent;
  transition: color .2s var(--im-ease), border-color .2s var(--im-ease);
}

.im-alert__link:hover,
.im-alert__link:focus-visible {
  color: var(--im-accent-soft);
  border-bottom-color: currentColor;
}

.im-command { position: relative; }

.im-command__inner {
  width: min(100% - var(--im-gutter) * 2, 1280px);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
  min-height: 68px;
}

/* 品牌锁形 */
.im-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: var(--im-white);
  text-decoration: none;
}

.im-brand:hover { color: var(--im-white); }

.im-brand__mark {
  position: relative;
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  border-radius: 11px;
  border: 1px solid var(--im-line);
  background: linear-gradient(140deg, var(--im-lift), var(--im-panel));
  overflow: hidden;
}

.im-brand__mark i {
  position: absolute;
  top: 7px;
  left: 9px;
  width: 6px;
  height: 22px;
  border-radius: 2px;
  background: var(--im-accent);
  transform: skewX(-18deg);
}

.im-brand__mark i + i {
  left: 20px;
  background: transparent;
  border: 1px solid var(--im-accent);
  opacity: .8;
}

.im-brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1;
}

.im-brand__name {
  font-family: var(--im-display);
  font-size: .98rem;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--im-white);
}

.im-brand__sub {
  font: 600 10px/1 var(--im-mono);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--im-accent);
}

/* 导航 */
.im-nav {
  display: flex;
  align-items: center;
  gap: clamp(6px, 1vw, 14px);
  margin-left: auto;
}

.im-nav__list {
  display: flex;
  align-items: center;
  gap: 3px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.im-nav__list li { margin: 0; }

.im-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
  color: var(--im-body);
  font: 600 14px/1 var(--im-sans);
  text-decoration: none;
  transition: color .22s var(--im-ease), background-color .22s var(--im-ease), border-color .22s var(--im-ease);
}

.im-nav__idx {
  font: 600 10px/1 var(--im-mono);
  letter-spacing: .08em;
  color: var(--im-muted);
  transition: color .22s var(--im-ease);
}

.im-nav__label { white-space: nowrap; }

.im-nav__link:hover {
  color: var(--im-white);
  background: var(--im-lift);
  border-color: var(--im-line);
}

.im-nav__link:hover .im-nav__idx { color: var(--im-accent-soft); }

.im-nav__link[aria-current="page"] {
  color: var(--im-ink);
  background: var(--im-accent);
  border-color: var(--im-accent);
  box-shadow: 0 8px 20px rgba(55, 245, 196, .22);
}

.im-nav__link[aria-current="page"] .im-nav__idx { color: rgba(6, 10, 22, .6); }

.im-nav__cta { flex: 0 0 auto; }

/* 移动菜单按钮 */
.im-navtoggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 10px 14px;
  border-radius: var(--im-radius-sm);
  border: 1px solid var(--im-line);
  background: var(--im-lift);
  color: var(--im-white);
  font: 600 13px/1 var(--im-sans);
  cursor: pointer;
  transition: border-color .2s var(--im-ease), background-color .2s var(--im-ease);
}

.im-navtoggle:hover { border-color: var(--im-accent); }

.im-navtoggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.im-navtoggle__bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--im-accent);
  transition: transform .26s var(--im-ease), opacity .26s var(--im-ease);
}

.im-navtoggle[aria-expanded="true"] .im-navtoggle__bars i:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.im-navtoggle[aria-expanded="true"] .im-navtoggle__bars i:nth-child(2) {
  opacity: 0;
  transform: scaleX(.2);
}

.im-navtoggle[aria-expanded="true"] .im-navtoggle__bars i:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.im-navtoggle__label { white-space: nowrap; }

/* 读取进度 */
.im-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}

.im-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--im-accent), var(--im-rose));
  transition: transform .12s linear;
}

/* ---------- 页脚 ---------- */

.im-footer {
  margin-top: clamp(56px, 9vw, 112px);
  background: linear-gradient(180deg, var(--im-panel), var(--im-ink) 72%);
  border-top: 1px solid var(--im-line);
  color: var(--im-body);
}

.im-footer__top {
  position: relative;
  padding-top: clamp(32px, 5vw, 58px);
  overflow: hidden;
}

.im-footer__top::before {
  content: "";
  position: absolute;
  top: -220px;
  right: -120px;
  width: 420px;
  height: 420px;
  border-radius: 46% 54% 62% 38% / 52% 44% 56% 48%;
  background: radial-gradient(circle at 35% 35%, rgba(55, 245, 196, .2), transparent 68%);
  filter: blur(6px);
  pointer-events: none;
}

.im-footer__brandrow {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: clamp(24px, 4vw, 40px);
  border-bottom: 1px solid var(--im-line);
}

.im-brand--footer .im-brand__mark {
  width: 42px;
  height: 42px;
  border-radius: 13px;
}

.im-brand--footer .im-brand__mark i { top: 9px; height: 24px; }
.im-brand--footer .im-brand__mark i + i { left: 22px; }
.im-brand--footer .im-brand__name { font-size: 1.12rem; }

.im-footer__summary {
  margin: 0;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--im-muted);
}

.im-footer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1.5fr;
  gap: clamp(24px, 4vw, 56px);
  padding: clamp(28px, 4vw, 48px) 0;
}

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

.im-footer__title {
  margin: 0 0 14px;
  font: 700 11px/1 var(--im-mono);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--im-accent);
}

.im-footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.im-footer__links li { margin: 0; }

.im-footer__links a {
  display: inline-block;
  color: var(--im-body);
  font-size: 14px;
  text-decoration: none;
  transition: color .2s var(--im-ease), transform .2s var(--im-ease);
}

.im-footer__links a:hover,
.im-footer__links a:focus-visible {
  color: var(--im-accent-soft);
  transform: translateX(3px);
}

.im-footer__contact {
  display: block;
  font: 600 14px/1.6 var(--im-mono);
  letter-spacing: .02em;
  color: var(--im-white);
  overflow-wrap: anywhere;
}

.im-footer__note {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--im-muted);
}

.im-footer__legalbar {
  border-top: 1px solid var(--im-line);
  background: rgba(6, 10, 22, .62);
  padding: 18px 0 26px;
}

.im-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  font: 500 12px/1.6 var(--im-mono);
  letter-spacing: .04em;
  color: var(--im-muted);
}

.im-footer__copy { margin: 0; }

.im-footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.im-footer__meta li { margin: 0; }

.im-footer__meta a {
  color: var(--im-muted);
  text-decoration: none;
  transition: color .2s var(--im-ease);
}

.im-footer__meta a:hover,
.im-footer__meta a:focus-visible { color: var(--im-accent-soft); }

/* ---------- 通用组件 ---------- */

.im-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: var(--im-radius-sm);
  border: 1px solid transparent;
  font: 700 14px/1 var(--im-sans);
  text-decoration: none;
  cursor: pointer;
  transition: background-color .22s var(--im-ease), color .22s var(--im-ease),
              border-color .22s var(--im-ease), box-shadow .22s var(--im-ease),
              transform .22s var(--im-ease);
}

.im-btn--solid {
  background: var(--im-accent);
  border-color: var(--im-accent);
  color: var(--im-ink);
}

.im-btn--solid:hover,
.im-btn--solid:focus-visible {
  background: var(--im-accent-soft);
  border-color: var(--im-accent-soft);
  color: var(--im-ink);
  box-shadow: 0 10px 26px rgba(55, 245, 196, .26);
  transform: translateY(-1px);
}

.im-btn--ghost {
  background: transparent;
  border-color: var(--im-line);
  color: var(--im-white);
}

.im-btn--ghost:hover,
.im-btn--ghost:focus-visible {
  border-color: var(--im-accent);
  color: var(--im-accent-soft);
}

.im-btn--sm {
  padding: 10px 16px;
  font-size: 13px;
  border-radius: 10px;
}

.im-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--im-line);
  background: var(--im-lift);
  color: var(--im-body);
  font: 600 13px/1 var(--im-sans);
  text-decoration: none;
  cursor: pointer;
  transition: color .2s var(--im-ease), background-color .2s var(--im-ease), border-color .2s var(--im-ease);
}

.im-chip:hover {
  color: var(--im-white);
  border-color: var(--im-accent);
}

.im-chip[data-active],
.im-chip[aria-pressed="true"] {
  background: var(--im-accent);
  border-color: var(--im-accent);
  color: var(--im-ink);
}

.im-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 8px;
  border: 1px solid rgba(55, 245, 196, .28);
  background: rgba(55, 245, 196, .12);
  color: var(--im-accent);
  font: 600 11px/1 var(--im-mono);
  letter-spacing: .1em;
  text-transform: uppercase;
}

.im-badge--rose {
  border-color: rgba(255, 107, 157, .32);
  background: rgba(255, 107, 157, .14);
  color: var(--im-rose);
}

.im-crumbs {
  font: 500 12px/1.6 var(--im-mono);
  letter-spacing: .06em;
  color: var(--im-muted);
  margin-bottom: 18px;
}

.im-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.im-crumbs li { margin: 0; }

.im-crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--im-line);
}

.im-crumbs a { color: var(--im-body); }
.im-crumbs a:hover { color: var(--im-accent); }

.im-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: 600 12px/1 var(--im-mono);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--im-accent);
  margin-bottom: 14px;
}

.im-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--im-accent);
}

.im-index {
  display: block;
  margin: 0;
  font-family: var(--im-display);
  font-weight: 900;
  font-size: clamp(3.6rem, 11vw, 9rem);
  line-height: .8;
  letter-spacing: -.04em;
  color: var(--im-line);
}

.im-index--accent { color: var(--im-accent); }

.im-panel {
  position: relative;
  padding: clamp(20px, 3vw, 34px);
  border-radius: var(--im-radius);
  border: 1px solid var(--im-line);
  background: var(--im-panel);
  overflow: hidden;
}

.im-panel--lift { background: var(--im-lift); }

.im-blob {
  position: absolute;
  z-index: 0;
  pointer-events: none;
  border-radius: 56% 44% 38% 62% / 48% 58% 42% 52%;
  background: radial-gradient(circle at 32% 32%, rgba(55, 245, 196, .22), transparent 70%);
  filter: blur(2px);
}

/* 图片容器基础规则（页面阶段放入 img 或留空） */
.im-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--im-radius);
  border: 1px solid var(--im-line);
  background:
    radial-gradient(120% 120% at 12% 0%, rgba(55, 245, 196, .16), transparent 55%),
    linear-gradient(160deg, var(--im-lift), var(--im-panel) 62%, #080E1E);
}

.im-media::after {
  content: attr(data-media-label);
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 16px;
  font: 600 11px/1.4 var(--im-mono);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--im-muted);
  background: linear-gradient(transparent, rgba(6, 10, 22, .88));
}

.im-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.im-media--wide { aspect-ratio: 16 / 9; }
.im-media--tall { aspect-ratio: 3 / 4; }
.im-media--square { aspect-ratio: 1 / 1; }

/* 揭示动画协议 */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .5s var(--im-ease), transform .5s var(--im-ease);
}

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

@keyframes im-nav-in {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 平板 ---------- */

@media (max-width: 1080px) {
  .im-nav__idx { display: none; }
  .im-footer__grid { grid-template-columns: 1fr 1fr; }
  .im-footer__col--contact { grid-column: 1 / -1; }
}

/* ---------- 移动端命令栏 ---------- */

@media (max-width: 960px) {
  .im-navtoggle { display: inline-flex; }

  .im-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    margin-left: 0;
    padding: 14px clamp(16px, 4vw, 26px) 22px;
    background: var(--im-panel);
    border-top: 1px solid var(--im-line);
    border-bottom: 1px solid var(--im-line);
    box-shadow: 0 26px 50px rgba(0, 0, 0, .55);
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }

  .im-nav[data-open] {
    display: flex;
    animation: im-nav-in .26s var(--im-ease);
  }

  .im-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .im-nav__link {
    justify-content: flex-start;
    padding: 13px 14px;
    font-size: 15px;
    border-radius: 10px;
  }

  .im-nav__idx { display: inline; }

  .im-nav__cta {
    width: 100%;
    margin-top: 12px;
    padding: 13px 18px;
    font-size: 14px;
  }

  .im-footer__grid { grid-template-columns: 1fr; }
  .im-footer__col--contact { grid-column: auto; }
  .im-grid--2,
  .im-grid--3 { grid-template-columns: 1fr; }
  .im-alert { font-size: 10px; }
}

@media (max-width: 560px) {
  .im-brand__name { font-size: .9rem; }
  .im-brand__sub { font-size: 9px; letter-spacing: .14em; }
  .im-brand__mark { width: 32px; height: 32px; }
  .im-brand__mark i { left: 8px; height: 20px; }
  .im-brand__mark i + i { left: 18px; }
  .im-navtoggle__label { display: none; }
  .im-footer__legal { flex-direction: column; align-items: flex-start; }
}

/* ---------- 减少动态偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .im-nav[data-open] { animation: none; }

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