/* ==========================================================================
   三牛娱乐平台 · 淬火靶场 QUENCH RANGE
   CF 战术竞技门户 · 设计系统
   色系：硝烟墨绿黑 / 熔火橙 / 毒液黄绿 / 冷钢青灰 / 烟白
   识别点：左侧战术 rail + HUD 角框 + 斜切角卡 + 弹药刻度条 + 扫描纹理
   ========================================================================== */

:root {
  --sn-bg: #0b0f0d;
  --sn-bg-2: #0f1512;
  --sn-panel: #141c17;
  --sn-panel-2: #1a241e;
  --sn-line: rgba(231, 226, 214, 0.14);
  --sn-line-soft: rgba(231, 226, 214, 0.07);
  --sn-paper: #e7e2d6;
  --sn-paper-2: #d6d0c1;
  --sn-ink: #0b0f0d;
  --sn-text: #dde2da;
  --sn-muted: #92a096;
  --sn-flame: #ff5a1f;
  --sn-flame-2: #ff8a3d;
  --sn-acid: #c4e538;
  --sn-steel: #7c8f88;
  --sn-warn: #ffb020;
  --sn-rail-w: 244px;
  --sn-ff-sans: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --sn-ff-mono: "JetBrains Mono", "Cascadia Mono", "Consolas", "SFMono-Regular", monospace;
  --sn-ease: cubic-bezier(0.22, 0.68, 0.16, 1);
}

* { box-sizing: border-box; }

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

body.sn-body {
  margin: 0;
  background: var(--sn-bg);
  color: var(--sn-text);
  font-family: var(--sn-ff-sans);
  font-size: 16px;
  line-height: 1.78;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.2; font-weight: 800; letter-spacing: -0.01em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; cursor: pointer; }
::selection { background: var(--sn-flame); color: #12090a; }

/* 全局纹理：细网格 + 扫描线 */
body.sn-body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(196, 229, 56, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(196, 229, 56, 0.028) 1px, transparent 1px),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.016) 0 1px, transparent 1px 4px);
  background-size: 72px 72px, 72px 72px, 100% 4px;
  opacity: 0.9;
}

.sn-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  padding: 12px 18px;
  background: var(--sn-acid);
  color: var(--sn-ink);
  font: 700 13px/1 var(--sn-ff-mono);
}
.sn-skip:focus { left: 12px; top: 12px; }

/* ============================ 左侧战术 rail ============================ */
.sn-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sn-rail-w);
  z-index: 80;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 26px 20px 22px;
  background:
    linear-gradient(180deg, rgba(255, 90, 31, 0.07), transparent 34%),
    #0a0e0c;
  border-right: 1px solid var(--sn-line);
  overflow-y: auto;
}
.sn-rail::after {
  content: "";
  position: absolute;
  right: -1px;
  top: 0;
  width: 1px;
  height: 160px;
  background: linear-gradient(180deg, var(--sn-flame), transparent);
}

.sn-brand { display: flex; align-items: center; gap: 12px; }
.sn-brand__mark { width: 42px; height: 42px; flex: none; }
.sn-brand__word { display: flex; flex-direction: column; line-height: 1.15; }
.sn-brand__word b { font-size: 17px; letter-spacing: 0.04em; }
.sn-brand__word i {
  font: 600 9.5px/1.5 var(--sn-ff-mono);
  font-style: normal;
  letter-spacing: 0.16em;
  color: var(--sn-steel);
  text-transform: uppercase;
}

.sn-rail__label {
  font: 600 9.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.24em;
  color: var(--sn-steel);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sn-rail__label::after { content: ""; flex: 1; height: 1px; background: var(--sn-line-soft); }

.sn-rail__nav { display: flex; flex-direction: column; gap: 2px; margin-top: -6px; }
.sn-rail__nav a {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 12px 10px 14px;
  font-size: 14.5px;
  font-weight: 600;
  color: #b9c2b9;
  border-left: 2px solid transparent;
  transition: color 0.25s var(--sn-ease), background 0.25s var(--sn-ease), border-color 0.25s var(--sn-ease);
}
.sn-rail__nav a span {
  font: 600 10px/1 var(--sn-ff-mono);
  color: #5d6b62;
  letter-spacing: 0.08em;
  transition: color 0.25s var(--sn-ease);
}
.sn-rail__nav a:hover { color: #fff; background: rgba(255, 255, 255, 0.035); }
.sn-rail__nav a.is-on {
  color: var(--sn-flame-2);
  background: linear-gradient(90deg, rgba(255, 90, 31, 0.14), transparent);
  border-left-color: var(--sn-flame);
}
.sn-rail__nav a.is-on span { color: var(--sn-flame); }

.sn-rail__stat {
  margin-top: auto;
  padding: 14px;
  border: 1px solid var(--sn-line);
  background: rgba(20, 28, 23, 0.7);
  font-family: var(--sn-ff-mono);
}
.sn-rail__stat b {
  display: block;
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--sn-steel);
  margin-bottom: 6px;
}
.sn-rail__stat span { font-size: 22px; font-weight: 700; color: var(--sn-acid); letter-spacing: 0.04em; }
.sn-rail__stat em {
  display: block;
  font-style: normal;
  font-size: 10.5px;
  color: var(--sn-muted);
  margin-top: 6px;
  letter-spacing: 0.06em;
}
.sn-rail__stat i {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 6px;
  background: var(--sn-acid);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(196, 229, 56, 0.16);
  animation: sn-pulse 2.4s infinite;
}
@keyframes sn-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.sn-rail__cta { width: 100%; justify-content: center; }

.sn-scrim {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(4, 7, 5, 0.72);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--sn-ease), visibility 0.3s;
}
.sn-scrim.is-open { opacity: 1; visibility: visible; }

/* ============================ 主舞台 ============================ */
.sn-stage { position: relative; z-index: 1; margin-left: var(--sn-rail-w); }

.sn-top {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 18px;
  height: 56px;
  padding: 0 26px;
  background: rgba(10, 14, 12, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--sn-line);
}
.sn-burger { display: none; }

.sn-top__badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font: 700 10px/1 var(--sn-ff-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sn-flame);
  padding: 7px 10px;
  border: 1px solid rgba(255, 90, 31, 0.42);
  background: rgba(255, 90, 31, 0.08);
  flex: none;
}
.sn-top__badge::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--sn-flame);
  animation: sn-pulse 2s infinite;
}

.sn-ticker {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to right, #000 0, #000 calc(100% - 30px), transparent 100%);
  mask-image: linear-gradient(to right, #000 0, #000 calc(100% - 30px), transparent 100%);
}
.sn-ticker__track {
  display: flex;
  gap: 34px;
  white-space: nowrap;
  font: 500 11.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.1em;
  color: #7f8d84;
  animation: sn-slide 42s linear infinite;
}
.sn-ticker__track b { color: var(--sn-acid); font-weight: 600; }
.sn-ticker__track em { color: var(--sn-flame-2); font-style: normal; }
@keyframes sn-slide {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.sn-top__links { display: flex; align-items: center; gap: 16px; flex: none; }
.sn-top__links a {
  font: 600 12px/1 var(--sn-ff-mono);
  letter-spacing: 0.08em;
  color: #a9b4ab;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.sn-top__links a:hover { color: var(--sn-flame-2); border-bottom-color: var(--sn-flame); }

/* ============================ 通用容器 ============================ */
.sn-shell { width: 100%; max-width: 1220px; margin: 0 auto; padding: 0 46px; }

.sn-sec { position: relative; padding: 96px 0; }
.sn-sec--tight { padding: 62px 0; }
.sn-sec--panel {
  background:
    linear-gradient(180deg, rgba(196, 229, 56, 0.03), transparent 60%),
    var(--sn-bg-2);
  border-top: 1px solid var(--sn-line-soft);
  border-bottom: 1px solid var(--sn-line-soft);
}
.sn-sec--paper { background: var(--sn-paper); color: #171b17; }
.sn-sec--paper .sn-sec__title { color: #10140f; }
.sn-sec--paper .sn-sec__lead { color: #4a5348; }
.sn-sec--paper .sn-eyebrow { color: #7b6a3f; }

.sn-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: 700 10.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sn-flame);
}
.sn-eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.sn-sec__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 46px;
}
.sn-sec__title { font-size: clamp(28px, 3.4vw, 44px); letter-spacing: -0.02em; }
.sn-sec__title em {
  font-style: normal;
  color: var(--sn-flame);
  position: relative;
}
.sn-sec__lead { margin-top: 14px; max-width: 60ch; color: var(--sn-muted); font-size: 15.5px; }
.sn-sec__more {
  flex: none;
  font: 700 12px/1 var(--sn-ff-mono);
  letter-spacing: 0.1em;
  color: var(--sn-text);
  border-bottom: 1px solid var(--sn-line);
  padding-bottom: 6px;
  transition: color 0.2s, border-color 0.2s;
}
.sn-sec__more:hover { color: var(--sn-flame); border-color: var(--sn-flame); }

/* HUD 角框：用伪元素画四角 */
.sn-hud { position: relative; }
.sn-hud::before,
.sn-hud::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 1px solid var(--sn-acid);
  opacity: 0.75;
  pointer-events: none;
}
.sn-hud::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.sn-hud::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

/* ============================ 按钮 ============================ */
.sn-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  background: transparent;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: transform 0.2s var(--sn-ease), background 0.25s, color 0.25s, border-color 0.25s;
}
.sn-btn:hover { transform: translateY(-2px); }
.sn-btn--flame { background: var(--sn-flame); color: #140a06; }
.sn-btn--flame:hover { background: var(--sn-flame-2); }
.sn-btn--acid { background: var(--sn-acid); color: #14190a; }
.sn-btn--acid:hover { background: #d6f25f; }
.sn-btn--ghost { border-color: rgba(231, 226, 214, 0.32); color: var(--sn-text); }
.sn-btn--ghost:hover { border-color: var(--sn-acid); color: var(--sn-acid); }
.sn-btn--ink { background: #10140f; color: var(--sn-paper); }
.sn-btn--ink:hover { background: #262d24; }
.sn-btn--sm { padding: 10px 18px; font-size: 12.5px; }

/* ============================ Hero ============================ */
.sn-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: clamp(560px, 84vh, 900px);
  overflow: hidden;
  border-bottom: 1px solid var(--sn-line);
}
.sn-hero__bg {
  position: absolute;
  inset: 0;
  background: #0a0d0b url("../images/hero-lg.jpg") center 42% / cover no-repeat;
  transform: scale(1.02);
  filter: saturate(0.92) contrast(1.06);
}
.sn-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(8, 11, 9, 0.96) 0%, rgba(8, 11, 9, 0.78) 46%, rgba(8, 11, 9, 0.42) 100%),
    linear-gradient(0deg, rgba(8, 11, 9, 0.98) 2%, rgba(8, 11, 9, 0.1) 58%);
}
.sn-hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 120px 46px 58px;
}
.sn-hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  border: 1px solid rgba(196, 229, 56, 0.35);
  background: rgba(196, 229, 56, 0.07);
  font: 700 10.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.2em;
  color: var(--sn-acid);
  text-transform: uppercase;
}
.sn-hero__title {
  margin: 26px 0 0;
  font-size: clamp(42px, 7.2vw, 92px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-weight: 900;
}
.sn-hero__title span {
  display: block;
  font-size: clamp(14px, 1.6vw, 20px);
  font-weight: 600;
  letter-spacing: 0.34em;
  color: var(--sn-steel);
  margin-top: 18px;
  text-transform: uppercase;
}
.sn-hero__title em {
  font-style: normal;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--sn-flame);
}
.sn-hero__lead {
  margin-top: 24px;
  max-width: 54ch;
  font-size: 16.5px;
  color: #c3ccc4;
}
.sn-hero__actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px; }

.sn-hero__readout {
  position: relative;
  z-index: 2;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--sn-line);
  background: rgba(9, 13, 11, 0.86);
  backdrop-filter: blur(4px);
}
.sn-readout {
  padding: 20px 26px;
  border-right: 1px solid var(--sn-line-soft);
}
.sn-readout:last-child { border-right: 0; }
.sn-readout b {
  display: block;
  font: 600 9.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.2em;
  color: #6f7d74;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.sn-readout span {
  font: 700 25px/1 var(--sn-ff-mono);
  color: var(--sn-paper);
  letter-spacing: -0.01em;
  white-space: nowrap;
  display: block;
}
.sn-readout span i { font-style: normal; font-size: 13px; color: var(--sn-acid); margin-left: 4px; }
.sn-readout em { display: block; font-style: normal; font-size: 12px; color: var(--sn-muted); margin-top: 8px; line-height: 1.6; }

/* ============================ 斜切卡 ============================ */
.sn-cut {
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.sn-grid { display: grid; gap: 20px; }
.sn-grid--2 { grid-template-columns: repeat(2, 1fr); }
.sn-grid--3 { grid-template-columns: repeat(3, 1fr); }
.sn-grid--4 { grid-template-columns: repeat(4, 1fr); }

.sn-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--sn-panel);
  border: 1px solid var(--sn-line-soft);
  overflow: hidden;
  transition: border-color 0.3s var(--sn-ease), transform 0.3s var(--sn-ease), background 0.3s;
}
.sn-card:hover { border-color: rgba(255, 90, 31, 0.55); transform: translateY(-4px); background: var(--sn-panel-2); }
.sn-card__media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #0d1210; }
.sn-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--sn-ease), filter 0.4s; filter: saturate(0.9); }
.sn-card:hover .sn-card__media img { transform: scale(1.05); filter: saturate(1.05); }
.sn-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(10, 14, 12, 0.82), transparent 62%);
}
.sn-card__idx {
  position: absolute;
  top: 12px;
  left: 14px;
  z-index: 2;
  font: 700 10.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.14em;
  color: var(--sn-acid);
  padding: 6px 9px;
  background: rgba(8, 12, 9, 0.78);
  border-left: 2px solid var(--sn-acid);
}
.sn-card__body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.sn-card__meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  font: 600 10.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.12em;
  color: #78867d;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.sn-card__meta span { padding: 4px 7px; border: 1px solid var(--sn-line); }
.sn-card__meta span:first-child { color: var(--sn-flame); border-color: rgba(255, 90, 31, 0.4); }
.sn-card__title { font-size: 19px; margin-bottom: 10px; }
.sn-card__title a:hover { color: var(--sn-flame-2); }
.sn-card__desc { font-size: 14px; color: var(--sn-muted); line-height: 1.8; }
.sn-card__foot {
  margin-top: auto;
  padding-top: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font: 600 11.5px/1 var(--sn-ff-mono);
  color: #8b998f;
}
.sn-card__foot b { color: var(--sn-acid); font-weight: 700; letter-spacing: 0.08em; }

/* 弹药刻度 */
.sn-ticks {
  display: flex;
  gap: 3px;
  height: 6px;
  margin-top: 14px;
}
.sn-ticks i { flex: 1; background: rgba(231, 226, 214, 0.12); }
.sn-ticks i.on { background: var(--sn-flame); }
.sn-ticks i.on-acid { background: var(--sn-acid); }

/* ============================ 数据面板 ============================ */
.sn-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--sn-line);
  background: linear-gradient(160deg, rgba(255, 90, 31, 0.08), transparent 55%);
}
.sn-metric {
  padding: 30px 26px;
  border-right: 1px solid var(--sn-line-soft);
  position: relative;
}
.sn-metric:last-child { border-right: 0; }
.sn-metric b {
  display: block;
  font: 600 9.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.2em;
  color: #74827a;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.sn-metric__num {
  font: 800 40px/1 var(--sn-ff-mono);
  letter-spacing: -0.03em;
  color: var(--sn-paper);
}
.sn-metric__num i { font-style: normal; color: var(--sn-flame); font-size: 20px; margin-left: 2px; }
.sn-metric em { display: block; font-style: normal; font-size: 13px; color: var(--sn-muted); margin-top: 12px; }

/* ============================ 流程步骤 ============================ */
.sn-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--sn-line); }
.sn-step {
  padding: 30px 26px 32px;
  border-right: 1px solid var(--sn-line-soft);
  border-bottom: 1px solid var(--sn-line-soft);
  position: relative;
}
.sn-step:last-child { border-right: 0; }
.sn-step__no {
  font: 800 34px/1 var(--sn-ff-mono);
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 90, 31, 0.75);
  letter-spacing: -0.02em;
}
.sn-step h3 { font-size: 16.5px; margin: 16px 0 8px; }
.sn-step p { font-size: 13.5px; color: var(--sn-muted); line-height: 1.8; }
.sn-step::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--sn-flame);
}

/* ============================ 资讯列表 ============================ */
.sn-news { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.sn-news__item { border-top: 1px solid var(--sn-line); padding-top: 20px; }
.sn-news__media { display: block; aspect-ratio: 16 / 10; overflow: hidden; margin-bottom: 16px; background: #0d1210; }
.sn-news__media img { width: 100%; height: 100%; object-fit: cover; filter: saturate(0.9); transition: transform 0.6s var(--sn-ease); }
.sn-news__item:hover .sn-news__media img { transform: scale(1.04); }
.sn-news__meta {
  font: 600 10.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.14em;
  color: var(--sn-flame);
  margin-bottom: 10px;
  text-transform: uppercase;
}
.sn-news__meta span { color: #6f7d74; margin-left: 8px; }
.sn-news__item h3 { font-size: 17.5px; line-height: 1.45; margin-bottom: 10px; }
.sn-news__item h3 a:hover { color: var(--sn-flame-2); }
.sn-news__item p { font-size: 13.5px; color: var(--sn-muted); }
.sn-link-arrow {
  display: inline-block;
  margin-top: 12px;
  font: 700 11.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.1em;
  color: var(--sn-acid);
}
.sn-link-arrow:hover { color: var(--sn-flame); }

/* ============================ FAQ ============================ */
.sn-faq { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 54px; align-items: start; }
.sn-faq__list { display: flex; flex-direction: column; }
.sn-faq__item { border-bottom: 1px solid var(--sn-line); }
.sn-faq__item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 40px 20px 0;
  position: relative;
  font-weight: 700;
  font-size: 15.5px;
  transition: color 0.2s;
}
.sn-faq__item summary::-webkit-details-marker { display: none; }
.sn-faq__item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font: 400 20px/1 var(--sn-ff-mono);
  color: var(--sn-flame);
}
.sn-faq__item[open] summary { color: var(--sn-flame-2); }
.sn-faq__item[open] summary::after { content: "−"; }
.sn-faq__a { padding: 0 40px 22px 0; font-size: 14px; color: var(--sn-muted); line-height: 1.85; }
.sn-faq__a a { color: var(--sn-acid); border-bottom: 1px solid rgba(196, 229, 56, 0.35); }

/* ============================ CTA ============================ */
.sn-cta {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 44px 46px;
  border: 1px solid rgba(255, 90, 31, 0.4);
  background:
    repeating-linear-gradient(135deg, rgba(255, 90, 31, 0.06) 0 12px, transparent 12px 24px),
    linear-gradient(120deg, rgba(255, 90, 31, 0.14), rgba(11, 15, 13, 0.9) 62%);
  overflow: hidden;
}
.sn-cta h2 { font-size: clamp(24px, 2.8vw, 34px); line-height: 1.25; }
.sn-cta p { margin-top: 12px; color: #b9c2b9; font-size: 14.5px; max-width: 56ch; }
.sn-cta__actions { display: flex; gap: 12px; flex-wrap: wrap; flex: none; }

/* ============================ keytags ============================ */
.sn-keytags { border-top: 1px solid var(--sn-line); background: #080b09; padding: 22px 0; }
.sn-keytags__inner { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; }
.sn-keytags__label {
  font: 700 9.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.22em;
  color: #5f6d64;
  text-transform: uppercase;
  margin-right: 8px;
}
.sn-keytags a {
  font-size: 13px;
  color: #9fac9f;
  padding: 6px 12px;
  border: 1px solid var(--sn-line-soft);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.sn-keytags a:hover { color: var(--sn-acid); border-color: rgba(196, 229, 56, 0.4); background: rgba(196, 229, 56, 0.05); }

/* ============================ footer ============================ */
.sn-footer { background: #070a08; border-top: 1px solid var(--sn-line); padding: 62px 0 26px; }
.sn-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 0.75fr 0.75fr 1fr;
  gap: 40px;
}
.sn-footer__intro { margin-top: 18px; font-size: 13.5px; color: #8e9b91; max-width: 40ch; line-height: 1.85; }
.sn-footer__badges { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.sn-footer__badges span {
  font: 600 9.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.14em;
  color: #7d8b81;
  padding: 7px 10px;
  border: 1px solid var(--sn-line-soft);
  text-transform: uppercase;
}
.sn-footer h4 {
  font: 700 10px/1 var(--sn-ff-mono);
  letter-spacing: 0.22em;
  color: #6d7b72;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.sn-footer__links { display: flex; flex-direction: column; gap: 11px; }
.sn-footer__links a { font-size: 13.5px; color: #b3bdb4; transition: color 0.2s; }
.sn-footer__links a:hover { color: var(--sn-flame-2); }
.sn-footer__contact { display: flex; flex-direction: column; gap: 12px; font-size: 13.5px; color: #b3bdb4; font-family: var(--sn-ff-mono); }
.sn-footer__contact b {
  display: block;
  font: 600 9px/1 var(--sn-ff-mono);
  letter-spacing: 0.2em;
  color: #63726a;
  margin-bottom: 5px;
}
.sn-footer__disclaimer {
  margin-top: 46px;
  padding-top: 22px;
  border-top: 1px solid var(--sn-line-soft);
  font-size: 12px;
  color: #6c7a71;
  line-height: 1.9;
}
.sn-footer__bottom {
  margin-top: 18px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font: 500 11.5px/1.6 var(--sn-ff-mono);
  color: #5c6a61;
  letter-spacing: 0.04em;
}
.sn-footer__bottom a:hover { color: var(--sn-acid); }

/* ============================ 内页页头 ============================ */
.sn-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font: 600 10.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.14em;
  color: #6f7d74;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.sn-crumb a:hover { color: var(--sn-acid); }
.sn-crumb span { color: #4d5a52; }

.sn-pagehead {
  position: relative;
  padding: 96px 0 56px;
  border-bottom: 1px solid var(--sn-line);
  background:
    linear-gradient(90deg, rgba(11, 15, 13, 0.92), rgba(11, 15, 13, 0.62)),
    var(--sn-pagehead-img, none) center 46% / cover no-repeat,
    #0c110e;
  overflow: hidden;
}
.sn-pagehead::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--sn-flame), transparent 60%);
}
.sn-pagehead__inner { position: relative; z-index: 2; }
.sn-pagehead h1 {
  font-size: clamp(30px, 4.4vw, 54px);
  letter-spacing: -0.03em;
  margin-bottom: 18px;
}
.sn-pagehead p { max-width: 62ch; color: #b6c0b7; font-size: 15.5px; }

.sn-pagehead__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.sn-chip {
  font: 600 10.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.12em;
  padding: 8px 11px;
  border: 1px solid var(--sn-line);
  color: #9dab9f;
  text-transform: uppercase;
}
.sn-chip--hot { color: var(--sn-flame-2); border-color: rgba(255, 90, 31, 0.45); background: rgba(255, 90, 31, 0.07); }
.sn-chip--acid { color: var(--sn-acid); border-color: rgba(196, 229, 56, 0.4); }

/* ============================ 模式卡（竖长型） ============================ */
.sn-mode {
  position: relative;
  display: block;
  min-height: 400px;
  background: #0d1210;
  border: 1px solid var(--sn-line-soft);
  overflow: hidden;
  transition: border-color 0.3s var(--sn-ease), transform 0.3s var(--sn-ease);
}
.sn-mode:hover { border-color: rgba(196, 229, 56, 0.55); transform: translateY(-4px); }
.sn-mode__bg { position: absolute; inset: 0; }
.sn-mode__bg img { width: 100%; height: 100%; object-fit: cover; filter: saturate(0.85) brightness(0.72); transition: transform 0.7s var(--sn-ease), filter 0.4s; }
.sn-mode:hover .sn-mode__bg img { transform: scale(1.06); filter: saturate(1) brightness(0.86); }
.sn-mode__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(8, 11, 9, 0.96) 6%, rgba(8, 11, 9, 0.35) 62%, rgba(8, 11, 9, 0.55) 100%);
}
.sn-mode__inner {
  position: relative;
  z-index: 2;
  height: 100%;
  min-height: 400px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 26px 24px 24px;
}
.sn-mode__no {
  position: absolute;
  top: 20px;
  right: 20px;
  font: 800 46px/1 var(--sn-ff-mono);
  color: transparent;
  -webkit-text-stroke: 1px rgba(231, 226, 214, 0.32);
}
.sn-mode__kicker {
  font: 700 10px/1 var(--sn-ff-mono);
  letter-spacing: 0.2em;
  color: var(--sn-acid);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.sn-mode h3 { font-size: 22px; margin-bottom: 10px; }
.sn-mode p { font-size: 13.5px; color: #b3bdb4; line-height: 1.8; }
.sn-mode__meta {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(231, 226, 214, 0.16);
  display: flex;
  justify-content: space-between;
  font: 600 10.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.1em;
  color: #8b998f;
}

/* ============================ 军械库卡 ============================ */
.sn-gun {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
  background: var(--sn-panel);
  border: 1px solid var(--sn-line-soft);
  overflow: hidden;
  transition: border-color 0.3s;
}
.sn-gun:hover { border-color: rgba(255, 90, 31, 0.5); }
.sn-gun__media { position: relative; background: #0a0e0c; overflow: hidden; }
.sn-gun__media img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(0.35) contrast(1.05); }
.sn-gun__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 10px;
  background: var(--sn-flame);
  color: #150a06;
  font: 800 9.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.sn-gun__body { padding: 24px 26px; }
.sn-gun__head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.sn-gun__head h3 { font-size: 20px; }
.sn-gun__head b { font: 700 11px/1 var(--sn-ff-mono); letter-spacing: 0.12em; color: var(--sn-acid); }
.sn-gun p { margin-top: 10px; font-size: 13.5px; color: var(--sn-muted); line-height: 1.8; }
.sn-stat-bars { margin-top: 18px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 26px; }
.sn-stat-bar { display: flex; align-items: center; gap: 10px; }
.sn-stat-bar b {
  flex: none;
  width: 52px;
  font: 600 9.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.1em;
  color: #78867d;
  text-transform: uppercase;
}
.sn-stat-bar__track { flex: 1; height: 5px; background: rgba(231, 226, 214, 0.1); position: relative; }
.sn-stat-bar__track i { position: absolute; inset: 0 auto 0 0; background: linear-gradient(90deg, var(--sn-flame), var(--sn-acid)); }
.sn-stat-bar em { font: 700 10.5px/1 var(--sn-ff-mono); color: #b3bdb4; font-style: normal; }

/* ============================ 筛选条 ============================ */
.sn-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--sn-line);
  margin-bottom: 30px;
}
.sn-filter button {
  padding: 9px 16px;
  background: transparent;
  border: 1px solid var(--sn-line);
  font: 600 12px/1 var(--sn-ff-mono);
  letter-spacing: 0.08em;
  color: #9dab9f;
  transition: all 0.22s var(--sn-ease);
}
.sn-filter button:hover { color: var(--sn-paper); border-color: rgba(231, 226, 214, 0.4); }
.sn-filter button.is-on { background: var(--sn-acid); border-color: var(--sn-acid); color: #14190a; }
.sn-filter__count { margin-left: auto; align-self: center; font: 600 11px/1 var(--sn-ff-mono); color: #6f7d74; letter-spacing: 0.1em; }

/* ============================ 表格 ============================ */
.sn-table-wrap { overflow-x: auto; border: 1px solid var(--sn-line); background: rgba(20, 28, 23, 0.6); }
.sn-table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 720px; }
.sn-table th, .sn-table td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--sn-line-soft); }
.sn-table th {
  font: 700 10px/1.4 var(--sn-ff-mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #7d8b81;
  background: rgba(255, 255, 255, 0.02);
  white-space: nowrap;
}
.sn-table td { color: #c3ccc4; }
.sn-table td b { color: var(--sn-acid); font-family: var(--sn-ff-mono); }
.sn-table tr:hover td { background: rgba(255, 90, 31, 0.05); }

/* ============================ 文章正文 ============================ */
.sn-article { max-width: 78ch; }
.sn-article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
  font: 600 10.5px/1 var(--sn-ff-mono);
  letter-spacing: 0.12em;
  color: #7d8b81;
  text-transform: uppercase;
}
.sn-article__meta span { padding: 6px 10px; border: 1px solid var(--sn-line); }
.sn-article h2 { font-size: 24px; margin: 40px 0 16px; padding-left: 16px; border-left: 3px solid var(--sn-flame); }
.sn-article h3 { font-size: 18px; margin: 28px 0 12px; color: var(--sn-acid); }
.sn-article p { margin-bottom: 18px; color: #c3ccc4; font-size: 15.5px; line-height: 1.95; }
.sn-article ul, .sn-article ol { margin: 0 0 20px; padding-left: 4px; display: flex; flex-direction: column; gap: 10px; }
.sn-article li { position: relative; padding-left: 22px; color: #c3ccc4; font-size: 15px; line-height: 1.9; }
.sn-article li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 2px;
  background: var(--sn-flame);
}
.sn-quote {
  margin: 30px 0;
  padding: 24px 28px;
  background: rgba(196, 229, 56, 0.05);
  border-left: 2px solid var(--sn-acid);
  font-size: 16px;
  color: #dfe6d9;
  line-height: 1.9;
}
.sn-quote cite { display: block; margin-top: 12px; font: 600 11px/1 var(--sn-ff-mono); color: #8b998f; font-style: normal; letter-spacing: 0.1em; }

/* ============================ 表单 ============================ */
.sn-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.sn-field { display: flex; flex-direction: column; gap: 8px; }
.sn-field--full { grid-column: 1 / -1; }
.sn-field label {
  font: 700 10px/1 var(--sn-ff-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #8b998f;
}
.sn-field input, .sn-field select, .sn-field textarea {
  width: 100%;
  padding: 13px 14px;
  background: rgba(10, 14, 12, 0.8);
  border: 1px solid var(--sn-line);
  color: var(--sn-paper);
  font-family: var(--sn-ff-sans);
  font-size: 14px;
  transition: border-color 0.2s, background 0.2s;
}
.sn-field textarea { min-height: 120px; resize: vertical; }
.sn-field input:focus, .sn-field select:focus, .sn-field textarea:focus {
  outline: none;
  border-color: var(--sn-flame);
  background: rgba(255, 90, 31, 0.05);
}
.sn-field input::placeholder, .sn-field textarea::placeholder { color: #5e6c63; }
.sn-form-msg { grid-column: 1 / -1; font: 600 12.5px/1.6 var(--sn-ff-mono); color: var(--sn-acid); display: none; }
.sn-form-msg.is-on { display: block; }

/* ============================ 分栏 / 信息列表 ============================ */
.sn-split { display: grid; grid-template-columns: 1fr 0.85fr; gap: 54px; align-items: start; }
.sn-split--even { grid-template-columns: 1fr 1fr; }
.sn-panelbox {
  padding: 30px 28px;
  background: var(--sn-panel);
  border: 1px solid var(--sn-line-soft);
}
.sn-panelbox h3 { font-size: 17px; margin-bottom: 16px; }
.sn-info-list { display: flex; flex-direction: column; gap: 0; }
.sn-info-list li {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--sn-line-soft);
  font-size: 13.5px;
}
.sn-info-list li:last-child { border-bottom: 0; }
.sn-info-list b { flex: none; font: 600 9.5px/1.6 var(--sn-ff-mono); letter-spacing: 0.16em; color: #74827a; text-transform: uppercase; }
.sn-info-list span { text-align: right; color: #c3ccc4; }

/* ============================ 404 ============================ */
.sn-404 {
  position: relative;
  min-height: calc(100vh - 56px);
  display: flex;
  align-items: center;
  padding: 80px 0;
  background:
    linear-gradient(120deg, rgba(11, 15, 13, 0.94), rgba(11, 15, 13, 0.76)),
    url("../images/hero-lg.jpg") center 40% / cover no-repeat;
}
.sn-404__code {
  font: 900 clamp(90px, 20vw, 220px) / 0.82 var(--sn-ff-mono);
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(255, 90, 31, 0.62);
  letter-spacing: -0.05em;
  margin-bottom: 18px;
}
.sn-404 h1 { font-size: clamp(24px, 3vw, 36px); margin-bottom: 16px; }
.sn-404__lead { max-width: 54ch; color: #b6c0b7; font-size: 15.5px; }
.sn-404__links { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 12px; }

/* ============================ 滚动入场 ============================ */
.sn-reveal { transition: opacity 0.7s var(--sn-ease), transform 0.7s var(--sn-ease); }
.sn-reveal.sn-pending { opacity: 0; transform: translateY(22px); }

/* ============================ 响应式 ============================ */
@media (max-width: 1220px) {
  .sn-shell { padding: 0 34px; }
  .sn-hero__inner { padding-left: 34px; padding-right: 34px; }
  .sn-gun { grid-template-columns: 200px 1fr; }
}

@media (max-width: 1080px) {
  :root { --sn-rail-w: 0px; }
  .sn-rail {
    width: 288px;
    transform: translateX(-100%);
    transition: transform 0.34s var(--sn-ease);
    box-shadow: 20px 0 60px rgba(0, 0, 0, 0.55);
  }
  .sn-rail.is-open { transform: translateX(0); }
  .sn-burger {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 0;
    margin-left: -8px;
    background: transparent;
    border: 1px solid var(--sn-line);
    flex: none;
  }
  .sn-burger span { display: block; width: 18px; height: 1.5px; margin: 0 auto; background: var(--sn-paper); transition: transform 0.25s, opacity 0.25s; }
  .sn-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  .sn-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .sn-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
  .sn-top { padding: 0 18px; gap: 12px; }
  .sn-stage { margin-left: 0; }
  .sn-top__badge { display: none; }
  .sn-sec { padding: 72px 0; }
  .sn-sec__head { flex-direction: column; align-items: flex-start; gap: 18px; }
  .sn-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .sn-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .sn-news { grid-template-columns: repeat(2, 1fr); }
  .sn-metrics { grid-template-columns: repeat(2, 1fr); }
  .sn-metric:nth-child(2) { border-right: 0; }
  .sn-metric:nth-child(1), .sn-metric:nth-child(2) { border-bottom: 1px solid var(--sn-line-soft); }
  .sn-steps { grid-template-columns: repeat(2, 1fr); }
  .sn-step:nth-child(2) { border-right: 0; }
  .sn-faq { grid-template-columns: 1fr; gap: 30px; }
  .sn-split, .sn-split--even { grid-template-columns: 1fr; gap: 34px; }
  .sn-hero__readout { grid-template-columns: repeat(2, 1fr); }
  .sn-readout:nth-child(2) { border-right: 0; }
  .sn-readout:nth-child(1), .sn-readout:nth-child(2) { border-bottom: 1px solid var(--sn-line-soft); }
  .sn-footer__grid { grid-template-columns: 1fr 1fr; gap: 34px; }
  .sn-cta { flex-direction: column; align-items: flex-start; padding: 34px 30px; }
}

@media (max-width: 720px) {
  .sn-shell { padding: 0 20px; }
  .sn-hero { min-height: 0; }
  .sn-hero__inner { padding: 92px 20px 40px; }
  .sn-hero__title { font-size: clamp(34px, 11vw, 56px); }
  .sn-hero__lead { font-size: 14.5px; }
  .sn-hero__actions .sn-btn { flex: 1 1 100%; justify-content: center; }
  .sn-pagehead { padding: 62px 0 40px; }
  .sn-sec { padding: 56px 0; }
  .sn-grid--2, .sn-grid--3, .sn-grid--4, .sn-news, .sn-metrics, .sn-steps, .sn-form { grid-template-columns: 1fr; }
  .sn-metric { border-right: 0; border-bottom: 1px solid var(--sn-line-soft); }
  .sn-metric:last-child { border-bottom: 0; }
  .sn-step { border-right: 0; }
  .sn-gun { grid-template-columns: 1fr; }
  .sn-gun__media { aspect-ratio: 16 / 9; }
  .sn-stat-bars { grid-template-columns: 1fr; }
  .sn-faq__item summary { font-size: 14.5px; padding-right: 32px; }
  .sn-footer__grid { grid-template-columns: 1fr; }
  .sn-top__links { display: none; }
  .sn-ticker__track { font-size: 10.5px; gap: 22px; }
  .sn-cta h2 { font-size: 22px; }
  .sn-404__code { font-size: clamp(72px, 26vw, 140px); }
  .sn-article p, .sn-article li { font-size: 14.5px; }
  .sn-sec__head { margin-bottom: 30px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .sn-ticker__track { animation: none; }
  .sn-reveal, .sn-reveal.sn-pending { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.001ms !important; }
}