/* ==========================================================================
   恶龙不是饿龙 · 龙巢终端 —— 样式
   换色只需改下面 :root 里的几个变量；整套配色只有这一处定义。
   ========================================================================== */

:root {
  --bg:        #04070b;
  --bg-2:      #070d15;
  --bg-3:      #0b131d;
  --ink:       #cfe9ff;
  --ink-2:     #8fa6b8;
  --ink-3:     #6d8496;
  --neon:      #00f0ff;   /* 主霓虹：青 */
  --neon-2:    #7dffd4;   /* 次霓虹：薄荷 */
  --hot:       #ff2a7f;   /* 强调：洋红 */
  --acid:      #d1ff00;   /* 极少量：酸黄 */
  --line:      rgba(0, 240, 255, .18);
  --line-2:    rgba(0, 240, 255, .34);
  --panel:     rgba(6, 14, 22, .72);
  --glow:      0 0 12px rgba(0, 240, 255, .45);
  --maxw:      1240px;
  --font:      "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:      ui-monospace, SFMono-Regular, "Cascadia Mono", Consolas, "Liberation Mono", Menlo, monospace;
}

/* 暗红变体：data-theme="blood"（在 data/site.js 里一行切换） */
:root[data-theme="blood"] {
  --neon:   #ff2f4e;
  --neon-2: #ff8f6b;
  --hot:    #ffd200;
  --acid:   #7dffd4;
  --line:   rgba(255, 60, 80, .18);
  --line-2: rgba(255, 60, 80, .34);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 底噪：一层极暗的网格 + 径向光 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(1100px 620px at 78% 8%, rgba(0, 240, 255, .10), transparent 62%),
    radial-gradient(760px 520px at 8% 92%, rgba(255, 42, 127, .09), transparent 66%),
    linear-gradient(rgba(0, 240, 255, .045) 1px, transparent 1px) 0 0 / 100% 46px,
    linear-gradient(90deg, rgba(0, 240, 255, .045) 1px, transparent 1px) 0 0 / 46px 100%,
    var(--bg);
}

a { color: var(--neon); text-decoration: none; }
a:hover { text-shadow: var(--glow); }

::selection { background: var(--hot); color: #06080c; }

/* 滚动条也做成霓虹的（Chrome / Edge / Safari） */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #05090e; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(to bottom, var(--neon), #0b6a86);
  border: 2px solid #05090e;
}
::-webkit-scrollbar-thumb:hover { background: var(--neon-2); }
html { scrollbar-color: #0e7d99 #05090e; scrollbar-width: thin; }

/* ============================ 装饰层 ============================ */
.fx { position: fixed; inset: 0; z-index: 60; pointer-events: none; }

.fx-scanlines {
  position: absolute; inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 0 2px,
    rgba(0, 0, 0, .30) 2px 3px
  );
  opacity: .5;
}

.fx-noise {
  position: absolute; inset: -50%;
  opacity: .05;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/></filter><rect width='140' height='140' filter='url(%23n)' opacity='.6'/></svg>");
  animation: noiseShift 1.1s steps(3) infinite;
}
@keyframes noiseShift {
  0%   { transform: translate(0, 0); }
  33%  { transform: translate(-3%, 2%); }
  66%  { transform: translate(2%, -3%); }
  100% { transform: translate(0, 0); }
}

.fx-vignette {
  position: absolute; inset: 0;
  background: radial-gradient(120% 100% at 50% 45%, transparent 42%, rgba(0, 0, 0, .72) 100%);
}

.fx-sweep {
  position: absolute; left: -20%; right: -20%; height: 34vh; top: -40vh;
  background: linear-gradient(to bottom, transparent, rgba(0, 240, 255, .045), transparent);
  animation: sweep 9s linear infinite;
}
@keyframes sweep {
  0%   { top: -40vh; }
  100% { top: 120vh; }
}

/* 四角框线 */
body::after {
  content: "";
  position: fixed; inset: 14px;
  z-index: 61; pointer-events: none;
  border: 1px solid rgba(0, 240, 255, .10);
  clip-path: polygon(
    0 0, 64px 0, 64px 1px, 1px 1px, 1px 64px, 0 64px,
    0 100%, 0 calc(100% - 64px), 1px calc(100% - 64px), 1px calc(100% - 1px),
    64px calc(100% - 1px), 64px 100%, 100% 100%,
    100% calc(100% - 64px), calc(100% - 1px) calc(100% - 64px),
    calc(100% - 1px) calc(100% - 1px), calc(100% - 64px) calc(100% - 1px),
    calc(100% - 64px) 100%, 100% 100%, 100% 0, calc(100% - 64px) 0,
    calc(100% - 64px) 1px, calc(100% - 1px) 1px, calc(100% - 1px) 64px, 100% 64px
  );
}

/* ============================== 首屏 ============================== */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  padding: 78px 26px 42px;
}
@supports (min-height: 100svh) {
  .hero { min-height: 100svh; }
}

.hero-cover { position: absolute; inset: 0; overflow: hidden; }
.hero-cover-img {
  position: absolute; inset: -4%;
  background: url("assets/cover.webp") center / cover no-repeat, var(--bg-2);
  transform: scale(1.06);
  will-change: transform;
  filter: saturate(1.08) contrast(1.06);
}
.hero-cover-tint {
  position: absolute; inset: 0;
  background:
    linear-gradient(100deg, rgba(4, 7, 11, .93) 0%, rgba(4, 7, 11, .74) 32%, rgba(4, 7, 11, .34) 60%, rgba(4, 7, 11, .58) 100%),
    linear-gradient(to bottom, rgba(4, 7, 11, .72) 0%, rgba(4, 7, 11, .04) 24%, rgba(4, 7, 11, .18) 66%, rgba(4, 7, 11, .96) 100%);
}
.hero-rain {
  position: absolute; inset: 0;
  /* 画布本身是透明的（字符自带辉光），不需要 mix-blend-mode ——
     去掉这层全屏混合后，软件渲染的机器上帧率约提升三成。 */
  opacity: .88;
}

.hero-inner {
  position: relative;
  z-index: 3;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 46px;
  align-items: end;
}

/* ---- 终端提示行 ---- */
.id-boot {
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--ink-2);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px;
  min-height: 22px;
}
.id-boot .prompt { color: var(--hot); }
.id-boot .sep, .id-boot .path { color: var(--ink-3); }
.id-boot .caret-sym { color: var(--neon-2); }
.boot-text { color: var(--neon-2); text-shadow: 0 0 8px rgba(125, 255, 212, .32); }
.caret {
  display: inline-block;
  width: 8px; height: 1.05em;
  background: var(--neon);
  box-shadow: var(--glow);
  animation: blink 1.05s steps(1) infinite;
  vertical-align: -2px;
}
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

/* ---- 主标题（ID 设计） ---- */
.id-title {
  position: relative;
  margin: 0 0 4px;
  font-weight: 900;
  font-size: clamp(2.55rem, 9.4vw, 7.4rem);
  line-height: 1.02;
  letter-spacing: .015em;
  color: #eaf7ff;
  text-shadow:
    0 0 1px rgba(0, 240, 255, .9),
    0 0 22px rgba(0, 240, 255, .28),
    0 0 60px rgba(0, 240, 255, .16);
  cursor: default;
  user-select: none;
}

/* 双影：青 / 洋红 错位，偶发撕裂 */
.id-title::before,
.id-title::after {
  content: attr(data-plain);
  position: absolute;
  left: 0; top: 0;
  white-space: nowrap;
  mix-blend-mode: screen;
  pointer-events: none;
}
.id-title::before {
  color: var(--neon);
  opacity: .42;
  transform: translate3d(-3px, 1px, 0);
  animation: ghostA 4.4s ease-in-out infinite;
}
.id-title::after {
  color: var(--hot);
  opacity: .38;
  transform: translate3d(3px, -1px, 0);
  animation: ghostB 4.4s ease-in-out infinite;
}
@keyframes ghostA {
  0%, 62%, 100% { transform: translate3d(-3px, 1px, 0); clip-path: inset(0 0 0 0); }
  66% { transform: translate3d(-9px, 1px, 0); clip-path: inset(18% 0 62% 0); }
  70% { transform: translate3d(-2px, 1px, 0); clip-path: inset(0 0 0 0); }
  86% { transform: translate3d(-6px, 2px, 0); clip-path: inset(64% 0 12% 0); }
  90% { transform: translate3d(-3px, 1px, 0); clip-path: inset(0 0 0 0); }
}
@keyframes ghostB {
  0%, 62%, 100% { transform: translate3d(3px, -1px, 0); clip-path: inset(0 0 0 0); }
  66% { transform: translate3d(9px, -1px, 0); clip-path: inset(52% 0 28% 0); }
  70% { transform: translate3d(2px, -1px, 0); clip-path: inset(0 0 0 0); }
  86% { transform: translate3d(6px, -2px, 0); clip-path: inset(8% 0 70% 0); }
  90% { transform: translate3d(3px, -1px, 0); clip-path: inset(0 0 0 0); }
}

.id-title .ch {
  display: inline-block;
  animation: chFlicker 6.5s steps(1) infinite;
}
.id-title .ch:nth-child(2) { animation-delay: .8s; }
.id-title .ch:nth-child(3) { animation-delay: 2.1s; }
.id-title .ch:nth-child(4) { animation-delay: 3.4s; }
.id-title .ch:nth-child(5) { animation-delay: 4.7s; }
.id-title .ch:nth-child(6) { animation-delay: 5.6s; }
@keyframes chFlicker {
  0%, 97%, 100% { opacity: 1; filter: none; }
  97.6% { opacity: .55; filter: blur(.4px); }
  98.4% { opacity: 1; }
}

/* 「恶」「饿」互换：同一位上两字叠着，一次闪现换过来 */
.id-title .ch.swap { position: relative; }
.id-title .ch.swap .g { display: block; }
.id-title .ch.swap .g.b { position: absolute; left: 0; top: 0; opacity: 0; color: var(--hot); text-shadow: var(--glow); }
.id-title.flip .ch.swap .g.a { opacity: 0; }
.id-title.flip .ch.swap .g.b { opacity: 1; }
.id-title.flip .ch.swap { transform: translate3d(0, 0, 0); text-shadow: 0 0 24px rgba(255, 42, 127, .6); }

.sr {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip-path: inset(50%); white-space: nowrap;
}

/* ---- 拉丁转写 ---- */
.id-latin {
  margin: 14px 0 0;
  font-family: var(--mono);
  font-size: clamp(.72rem, 2.2vw, 1rem);
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--neon);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}
.lat-main { text-shadow: var(--glow); }
.lat-neq { color: var(--hot); font-size: 1.25em; letter-spacing: 0; }
.lat-sub { color: var(--ink-2); letter-spacing: .26em; }

.id-tag {
  margin: 16px 0 0;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: .06em;
}

.id-meta {
  margin: 14px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.meta-chip {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  padding: 4px 10px;
  color: var(--neon-2);
  border: 1px solid var(--line-2);
  background: rgba(0, 240, 255, .05);
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
}

.hero-hint {
  margin: 30px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ink-3);
}
.hint-arrow { display: inline-block; color: var(--neon); animation: bob 1.7s ease-in-out infinite; }
@keyframes bob { 0%, 100% { transform: translateY(-2px); } 50% { transform: translateY(3px); } }

/* ---- 本机读数面板 ---- */
.hud {
  position: relative;
  padding: 16px 18px 14px;
  background: var(--panel);
  border: 1px solid var(--line-2);
  backdrop-filter: blur(7px);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}
.hud::before,
.hud::after {
  content: "";
  position: absolute;
  width: 26px; height: 2px;
  background: var(--neon);
  box-shadow: var(--glow);
}
.hud::before { left: 14px; top: -1px; }
.hud::after { right: 14px; bottom: -1px; }

.hud-head {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--neon);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.hud-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--neon-2);
  box-shadow: 0 0 8px var(--neon-2);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .28; } }
.hud-sub { margin-left: auto; color: var(--ink-3); letter-spacing: .18em; font-size: 10.5px; }

.hud-list { margin: 8px 0 0; padding: 0; }
.hud-row {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 12px;
  padding: 5px 0;
  border-bottom: 1px dashed rgba(0, 240, 255, .10);
}
.hud-row:last-child { border-bottom: 0; }
.hud-k { display: flex; flex-direction: column; gap: 1px; }
.hud-en { font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em; color: var(--ink-3); }
.hud-cn { font-size: 11.5px; color: var(--ink-2); }
.hud-v {
  margin: 0;
  font-family: var(--mono);
  font-size: 13.5px;
  font-variant-numeric: tabular-nums;
  color: var(--neon-2);
  text-shadow: 0 0 10px rgba(125, 255, 212, .28);
}
.hud-note {
  margin: 10px 0 0;
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--ink-3);
}

/* ---- 首屏页脚条 ---- */
.hero-foot {
  position: absolute;
  left: 0; right: 0; bottom: 40px;
  z-index: 4;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 26px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--ink-2);
  text-shadow: 0 1px 6px rgba(0, 0, 0, .9);
}

/* ============================== 分区 ============================== */
.section {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 84px 26px;
}

.sec-title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 10px;
  font-size: clamp(1.35rem, 3.6vw, 2rem);
  font-weight: 800;
  letter-spacing: .04em;
}
.sec-num {
  font-family: var(--mono);
  font-size: .72em;
  color: var(--hot);
  text-shadow: var(--glow);
}
.sec-en {
  font-family: var(--mono);
  font-size: .6em;
  font-weight: 400;
  letter-spacing: .24em;
  color: var(--ink-3);
}
.sec-lead {
  margin: 0 0 28px;
  max-width: 62ch;
  color: var(--ink-2);
  font-size: 14.5px;
}

/* ---- 舱门 ---- */
.gate-grid {
  list-style: none; margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 14px;
}
.gate {
  position: relative;
  padding: 18px 16px 16px;
  background: linear-gradient(160deg, rgba(0, 240, 255, .06), rgba(0, 240, 255, .015));
  border: 1px solid var(--line);
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}
.gate:hover {
  transform: translateY(-3px);
  border-color: var(--neon);
  box-shadow: 0 10px 34px rgba(0, 240, 255, .14), inset 0 0 24px rgba(0, 240, 255, .05);
}
.gate-idx {
  font-family: var(--mono); font-size: 11px; color: var(--hot); letter-spacing: .14em;
}
.gate-cn {
  display: block;
  margin: 8px 0 0;
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: .08em;
}
.gate-en {
  display: block;
  margin-top: 2px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .22em;
  color: var(--neon);
}
.gate-desc {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--ink-2);
}
.gate-state {
  display: inline-block;
  margin-top: 12px;
  padding: 2px 8px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--ink-3);
  border: 1px dashed var(--line-2);
}
.gate.open .gate-state { color: var(--acid); border-style: solid; }
.gate-arrow {
  position: absolute;
  right: 14px; top: 14px;
  font-family: var(--mono);
  color: var(--ink-3);
}
.gate:hover .gate-arrow { color: var(--neon); }

/* ---- 状态 ---- */
.stat-grid {
  list-style: none; margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}
.stat {
  padding: 14px 16px;
  background: rgba(8, 16, 24, .6);
  border: 1px solid var(--line);
  border-left: 2px solid var(--neon);
}
.stat-cn {
  display: block;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--ink-3);
}
.stat-v {
  display: block;
  margin-top: 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--neon-2);
  font-variant-numeric: tabular-nums;
}

/* ============================ 龙脊带 ============================ */
.band {
  position: relative;
  z-index: 1;
  height: clamp(210px, 34vh, 400px);
  margin: 10px 0 0;
  overflow: hidden;
  display: grid;
  place-items: center;
}
.band-img {
  position: absolute; inset: 0;
  background: url("assets/dragon.webp") center / cover no-repeat;
  opacity: .92;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0, #000 26%, #000 74%, transparent 100%),
                      linear-gradient(to right, transparent 0, #000 12%, #000 88%, transparent 100%);
  mask-image: linear-gradient(to bottom, transparent 0, #000 26%, #000 74%, transparent 100%),
              linear-gradient(to right, transparent 0, #000 12%, #000 88%, transparent 100%);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
}
/* 题字底下压一层暗，免得压在龙身上看不清 */
.band::after {
  content: "";
  position: absolute; inset: 0;
  z-index: 1;
  background: radial-gradient(46% 62% at 50% 50%, rgba(4, 7, 11, .80) 0%, rgba(4, 7, 11, .45) 46%, transparent 72%);
  pointer-events: none;
}
.band-cap {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 0;
  font-family: var(--mono);
  letter-spacing: .3em;
}
.band-cn {
  font-size: clamp(1.5rem, 4.4vw, 2.6rem);
  font-weight: 900;
  letter-spacing: .18em;
  color: #f2fbff;
  text-shadow: 0 0 18px rgba(0, 240, 255, .55), 0 0 46px rgba(255, 42, 127, .35);
}
.band-rule {
  width: clamp(40px, 12vw, 140px);
  height: 1px;
  background: linear-gradient(to right, transparent, var(--neon), transparent);
}
.band-en {
  font-size: clamp(.74rem, 2.2vw, 1rem);
  color: var(--neon);
  text-shadow: var(--glow);
}

/* ============================== 页脚 ============================== */
.foot {
  position: relative;
  z-index: 1;
  padding: 40px 26px 66px;
  text-align: center;
  border-top: 1px solid var(--line);
  background: linear-gradient(to bottom, transparent, rgba(0, 240, 255, .03));
}
.foot-seal {
  width: 76px; height: 76px;
  margin: 0 auto 18px;
  display: grid; place-items: center;
}
.foot-seal img {
  width: 100%; height: 100%; display: block;
  filter: drop-shadow(0 0 14px rgba(0, 240, 255, .42));
}
.foot-line {
  margin: 0 0 6px;
  font-size: 15px;
  letter-spacing: .1em;
}
.foot-line strong { color: var(--neon); text-shadow: var(--glow); }
.foot-link {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--neon-2);
  border-bottom: 1px dashed var(--line-2);
  padding-bottom: 1px;
}
.foot-link:hover { border-bottom-style: solid; }
.foot-sep { color: var(--ink-3); margin: 0 6px; }
.foot-note {
  margin: 4px 0 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ink-3);
}
.foot-ai { opacity: .78; }

/* ============================== 提示条 ============================== */
.toast {
  position: fixed;
  left: 50%; bottom: 26px;
  z-index: 80;
  transform: translate(-50%, 18px);
  padding: 11px 20px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: #05080c;
  background: var(--neon);
  box-shadow: 0 0 28px rgba(0, 240, 255, .5);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
}
.toast.on { opacity: 1; transform: translate(-50%, 0); }

.noscript {
  margin: 0; padding: 22px 26px;
  background: var(--hot); color: #06080c;
  font-weight: 700;
}
.noscript p { margin: 0 0 6px; }

/* ============================== 适配 ============================== */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: minmax(0, 1fr); gap: 30px; align-items: start; }
  .hud { order: 2; }
  .hero { padding: 64px 20px 34px; }
  .hero-foot { display: none; }
  .section { padding: 62px 20px; }
  body::after { inset: 8px; }
  .hero-cover-img {
    inset: 0;
    background-image: url("assets/cover-m.webp");
    background-position: 50% 42%;
  }
  .hero-cover-tint {
    background:
      linear-gradient(to bottom, rgba(4, 7, 11, .90) 0%, rgba(4, 7, 11, .70) 24%, rgba(4, 7, 11, .86) 58%, rgba(4, 7, 11, .97) 100%);
  }
  .band { height: clamp(150px, 26vh, 240px); }
  .band-img { background-size: 200% auto; background-position: 42% 50%; }
}
@media (max-width: 420px) {
  .id-latin { letter-spacing: .2em; gap: 8px; }
  .lat-sub { letter-spacing: .16em; }
}
@media (max-height: 720px) and (min-width: 901px) {
  .hero { padding-top: 56px; padding-bottom: 30px; }
  .id-title { font-size: clamp(2.4rem, 7.4vw, 5.4rem); }
}

/* 尊重系统「减弱动效」 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fx-noise, .fx-sweep, .hint-arrow, .hud-dot, .caret,
  .id-title::before, .id-title::after, .id-title .ch { animation: none !important; }
}