/* ==========================================================================
   瑞丰娱乐平台官网 · 样式总表
   视觉体系：Graphite & Signal Orange（深石墨底 + 信号橙强调 + 冰银文字）
   结构特征：零圆角 / 斜切按钮 / 交替横向卡 / 编号式版块头
   ========================================================================== */

:root {
  --ink-0: #0a0c0f;
  --ink-1: #0f1318;
  --ink-2: #151b22;
  --ink-3: #1e2630;
  --ink-4: #2a3542;
  --line: rgba(255, 255, 255, .08);
  --line-2: rgba(255, 255, 255, .16);
  --signal: #ff5a2b;
  --signal-2: #ff7d55;
  --signal-deep: #c73f16;
  --ice: #e6eef6;
  --ice-2: #a3b3c2;
  --ice-3: #6d7d8c;
  --mint: #5fe3c0;
  --sheet: #eef1f4;
  --dark-text: #10151b;
  --shell: min(1240px, 92vw);
  --ease: cubic-bezier(.22, .61, .24, 1);
  --shadow-1: 0 18px 44px rgba(0, 0, 0, .45);
  --shadow-2: 0 26px 70px rgba(0, 0, 0, .6);
}

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

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

body {
  margin: 0;
  background: var(--ink-0);
  color: var(--ice);
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(720px 420px at 82% -6%, rgba(255, 90, 43, .13), transparent 62%),
    radial-gradient(640px 380px at 4% 12%, rgba(95, 227, 192, .06), transparent 60%);
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

::selection {
  background: var(--signal);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--signal-2);
  outline-offset: 3px;
}

.rf-shell {
  width: var(--shell);
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.rf-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 99;
  background: var(--signal);
  color: #fff;
  padding: .7rem 1.2rem;
}

.rf-skip:focus {
  left: 1rem;
  top: 1rem;
}

/* ---------- 顶条 ---------- */
.rf-strip {
  background: var(--ink-0);
  border-bottom: 1px solid var(--line);
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--ice-3);
}

.rf-strip__in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 38px;
}

.rf-strip__note {
  display: flex;
  align-items: center;
  gap: .55rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rf-strip__note .rf-dot {
  width: 6px;
  height: 6px;
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(95, 227, 192, .16);
  animation: rf-pulse 2.4s infinite;
}

@keyframes rf-pulse {
  50% { opacity: .35; }
}

.rf-strip__links {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  white-space: nowrap;
}

.rf-strip__links a:hover { color: var(--signal-2); }

.rf-strip__tag {
  padding-left: 1.1rem;
  border-left: 1px solid var(--line-2);
  color: var(--ice-2);
  letter-spacing: .22em;
  font-size: .7rem;
}

/* ---------- 主站头 ---------- */
.rf-head {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(10, 12, 15, .82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}

.rf-head.is-stuck {
  background: rgba(10, 12, 15, .96);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .45);
}

.rf-head__in {
  display: flex;
  align-items: center;
  gap: 2rem;
  min-height: 74px;
}

.rf-brand {
  display: flex;
  align-items: center;
  gap: .7rem;
  flex: 0 0 auto;
}

.rf-brand img {
  width: 168px;
  height: auto;
}

.rf-nav {
  margin-left: auto;
}

.rf-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(.4rem, 1.4vw, 1.35rem);
}

.rf-nav a {
  position: relative;
  display: block;
  padding: .45rem .1rem;
  font-size: .95rem;
  font-weight: 600;
  color: var(--ice-2);
  white-space: nowrap;
  transition: color .22s var(--ease);
}

.rf-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s var(--ease);
}

.rf-nav a:hover,
.rf-nav a.is-on { color: var(--ice); }

.rf-nav a:hover::after,
.rf-nav a.is-on::after { transform: scaleX(1); }

.rf-nav__foot { display: none; }

.rf-head__act {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 0 0 auto;
}

.rf-link-plain {
  font-size: .92rem;
  font-weight: 600;
  color: var(--ice-2);
  border-bottom: 1px solid transparent;
  transition: .22s var(--ease);
}

.rf-link-plain:hover {
  color: var(--ice);
  border-color: var(--signal);
}

/* ---------- 按钮 ---------- */
.rf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .86rem 1.7rem;
  font-size: .93rem;
  font-weight: 700;
  letter-spacing: .03em;
  line-height: 1.2;
  border: 1px solid transparent;
  transition: transform .22s var(--ease), background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.rf-btn--signal {
  background: var(--signal);
  color: #fff;
  box-shadow: 0 10px 26px rgba(255, 90, 43, .28);
}

.rf-btn--signal:hover {
  background: var(--signal-2);
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(255, 90, 43, .4);
}

.rf-btn--ice {
  background: var(--ice);
  color: var(--dark-text);
}

.rf-btn--ice:hover {
  background: #fff;
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(230, 238, 246, .16);
}

.rf-btn--ghost {
  border-color: var(--line-2);
  color: var(--ice);
  background: rgba(255, 255, 255, .02);
}

.rf-btn--ghost:hover {
  border-color: var(--signal);
  color: var(--signal-2);
  transform: translateY(-2px);
}

.rf-btn--sm {
  padding: .66rem 1.15rem;
  font-size: .86rem;
}

.rf-btn--lg {
  padding: 1.02rem 2rem;
  font-size: 1rem;
}

.rf-btn--block {
  width: 100%;
}

.rf-arrow {
  display: inline-block;
  transition: transform .22s var(--ease);
}

.rf-btn:hover .rf-arrow,
.rf-more:hover .rf-arrow { transform: translateX(4px); }

.rf-burger {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-2);
  position: relative;
}

.rf-burger span {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 2px;
  background: var(--ice);
  transition: transform .26s var(--ease), opacity .2s;
}

.rf-burger span:first-child { top: 16px; }
.rf-burger span:last-child { top: 24px; }

.rf-burger[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.rf-burger[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ---------- 通用版块 ---------- */
.rf-main { position: relative; z-index: 1; }

.rf-section {
  padding: clamp(3.4rem, 7vw, 6.2rem) 0;
  position: relative;
}

.rf-section--tight { padding: clamp(2.4rem, 4.6vw, 3.6rem) 0; }

.rf-section--sheet {
  background: var(--sheet);
  color: var(--dark-text);
}

.rf-section--sheet .rf-sec-head__en,
.rf-section--sheet .rf-sec-head__idx { color: #8b97a3; }

.rf-section--sheet .rf-sec-head__desc { color: #5a6673; }

.rf-sec-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(2rem, 4vw, 3.2rem);
}

.rf-section--sheet .rf-sec-head { border-color: rgba(16, 21, 27, .12); }

.rf-sec-head__l {
  display: flex;
  align-items: baseline;
  gap: clamp(.9rem, 2vw, 1.6rem);
  flex-wrap: wrap;
}

.rf-sec-head__idx {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--signal);
  padding-top: .3rem;
}

.rf-sec-head__en {
  display: block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--ice-3);
  margin-bottom: .35rem;
}

.rf-sec-head h2 {
  font-size: clamp(1.5rem, 3vw, 2.15rem);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.25;
}

.rf-sec-head__desc {
  max-width: 33rem;
  font-size: .95rem;
  color: var(--ice-2);
  margin-top: .6rem;
}

.rf-more {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .9rem;
  font-weight: 700;
  color: var(--signal);
  white-space: nowrap;
  padding-bottom: .2rem;
  border-bottom: 1px solid rgba(255, 90, 43, .35);
}

.rf-section--sheet .rf-more { color: var(--signal-deep); border-color: rgba(199, 63, 22, .3); }

.rf-section--sheet .rf-btn--ghost {
  border-color: rgba(16, 21, 27, .22);
  color: var(--dark-text);
  background: transparent;
}

.rf-section--sheet .rf-btn--ghost:hover {
  border-color: var(--signal-deep);
  color: var(--signal-deep);
}

/* ---------- 首页 Hero ---------- */
.rf-hero {
  padding-top: clamp(2.4rem, 5vw, 4.2rem);
  padding-bottom: clamp(2rem, 4vw, 3rem);
  position: relative;
  overflow: hidden;
}

.rf-hero::after {
  content: "RUIFENG";
  position: absolute;
  right: -1.2rem;
  top: 2rem;
  font-size: clamp(6rem, 17vw, 15rem);
  font-weight: 800;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, .05);
  line-height: 1;
  pointer-events: none;
  z-index: 0;
}

.rf-hero__grid {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: clamp(2rem, 4.5vw, 4rem);
  align-items: center;
  position: relative;
  z-index: 1;
}

.rf-hero__tag {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--signal-2);
  border: 1px solid rgba(255, 90, 43, .35);
  padding: .42rem .9rem;
  margin-bottom: 1.5rem;
}

.rf-hero h1 {
  font-size: clamp(2.1rem, 4.6vw, 3.5rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.02em;
}

.rf-hero h1 em {
  font-style: normal;
  color: var(--signal);
  position: relative;
  white-space: nowrap;
}

.rf-hero__lead {
  margin-top: 1.35rem;
  max-width: 34rem;
  font-size: clamp(.98rem, 1.35vw, 1.08rem);
  color: var(--ice-2);
}

.rf-hero__lead strong { color: var(--ice); font-weight: 700; }

.rf-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  margin-top: 2rem;
}

.rf-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem;
  margin-top: 2.2rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}

.rf-hero__meta span {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .82rem;
  color: var(--ice-3);
}

.rf-hero__meta b {
  color: var(--ice);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.rf-hero__meta i {
  width: 5px;
  height: 5px;
  background: var(--mint);
  display: inline-block;
}

/* 右侧竖版海报 */
.rf-poster {
  position: relative;
  justify-self: end;
  width: min(100%, 420px);
}

.rf-poster__frame {
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% 86%, 86% 100%, 0 100%);
  background: var(--ink-2);
  box-shadow: var(--shadow-2);
  overflow: hidden;
}

.rf-poster__frame img {
  width: 100%;
  aspect-ratio: 760 / 1088;
  object-fit: cover;
  transition: transform .8s var(--ease);
}

.rf-poster:hover .rf-poster__frame img { transform: scale(1.035); }

.rf-poster__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 12, 15, .35) 0%, transparent 32%, rgba(10, 12, 15, .55) 100%);
}

.rf-poster__no {
  position: absolute;
  right: -.4rem;
  top: 1rem;
  writing-mode: vertical-rl;
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .34em;
  color: var(--ice-3);
  z-index: 2;
}

.rf-poster__badge {
  position: absolute;
  left: 0;
  bottom: 3.4rem;
  z-index: 3;
  background: var(--signal);
  color: #fff;
  padding: .8rem 1.15rem;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .02em;
  max-width: 78%;
  box-shadow: 0 14px 30px rgba(0, 0, 0, .45);
}

.rf-poster__badge small {
  display: block;
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .2em;
  opacity: .85;
  text-transform: uppercase;
}

.rf-poster__corner {
  position: absolute;
  left: -1px;
  top: -1px;
  width: 74px;
  height: 74px;
  border-left: 1px solid rgba(255, 90, 43, .6);
  border-top: 1px solid rgba(255, 90, 43, .6);
  z-index: 3;
}

/* ---------- 数据条 ---------- */
.rf-stats {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, .02), transparent);
}

.rf-stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.rf-stats__item {
  padding: 1.7rem 1.4rem;
  border-left: 1px solid var(--line);
}

.rf-stats__item:first-child { border-left: 0; }

.rf-stats__item b {
  display: block;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  font-weight: 800;
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
  color: var(--ice);
}

.rf-stats__item b span { color: var(--signal); font-size: .62em; margin-left: .15rem; }

.rf-stats__item small {
  display: block;
  margin-top: .25rem;
  font-size: .8rem;
  letter-spacing: .12em;
  color: var(--ice-3);
}

/* ---------- 能力卡（三列编号卡） ---------- */
.rf-caps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.rf-cap {
  position: relative;
  background: var(--ink-1);
  padding: 2.2rem 1.8rem 2rem;
  overflow: hidden;
  transition: background .3s var(--ease);
}

.rf-cap::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .38s var(--ease);
}

.rf-cap:hover { background: var(--ink-2); }
.rf-cap:hover::before { transform: scaleX(1); }

.rf-cap__idx {
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--signal);
}

.rf-cap h3 {
  margin-top: .9rem;
  font-size: 1.18rem;
  font-weight: 800;
  letter-spacing: -.01em;
}

.rf-cap p {
  margin-top: .7rem;
  font-size: .92rem;
  color: var(--ice-2);
}

.rf-cap__list {
  margin-top: 1.1rem;
  display: grid;
  gap: .45rem;
}

.rf-cap__list li {
  display: flex;
  gap: .55rem;
  font-size: .86rem;
  color: var(--ice-3);
}

.rf-cap__list li::before {
  content: "";
  flex: 0 0 auto;
  width: 14px;
  height: 1px;
  background: var(--signal);
  margin-top: .72rem;
}

/* ---------- 游戏交替横卡 ---------- */
.rf-glist { border-top: 1px solid var(--line); }

.rf-gcard {
  display: grid;
  grid-template-columns: minmax(0, 400px) 1fr;
  gap: clamp(1.4rem, 3.4vw, 3.2rem);
  align-items: center;
  padding: clamp(1.8rem, 3.6vw, 2.8rem) 0;
  border-bottom: 1px solid var(--line);
}

.rf-gcard:nth-child(even) { grid-template-columns: 1fr minmax(0, 400px); }
.rf-gcard:nth-child(even) .rf-gcard__media { order: 2; }

.rf-gcard__media {
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 90% 100%, 0 100%);
  background: var(--ink-2);
}

.rf-gcard__media img {
  width: 100%;
  aspect-ratio: 76 / 72.5;
  object-fit: cover;
  transition: transform .7s var(--ease);
}

.rf-gcard:hover .rf-gcard__media img { transform: scale(1.045); }

.rf-gcard__media::after {
  content: attr(data-no);
  position: absolute;
  left: 0;
  top: 0;
  background: var(--signal);
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  padding: .35rem .7rem;
  z-index: 2;
}

.rf-gcard__body { min-width: 0; }

.rf-gcard__kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--ice-3);
  text-transform: uppercase;
}

.rf-gcard__kicker span {
  padding: .18rem .6rem;
  border: 1px solid var(--line-2);
  color: var(--ice-2);
  letter-spacing: .06em;
}

.rf-gcard h3 {
  margin-top: .8rem;
  font-size: clamp(1.25rem, 2.2vw, 1.6rem);
  font-weight: 800;
  letter-spacing: -.01em;
}

.rf-gcard p {
  margin-top: .7rem;
  font-size: .94rem;
  color: var(--ice-2);
  max-width: 46rem;
}

.rf-gcard__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  margin-top: 1.2rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
}

.rf-gcard__facts div {
  font-size: .78rem;
  color: var(--ice-3);
  letter-spacing: .06em;
}

.rf-gcard__facts b {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ice);
  letter-spacing: 0;
  margin-top: .1rem;
}

.rf-gcard__cta {
  margin-top: 1.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

/* ---------- 资讯编辑式 ---------- */
.rf-news-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: clamp(1.5rem, 3.4vw, 3rem);
  align-items: start;
}

.rf-lead-news {
  display: block;
  position: relative;
  overflow: hidden;
  background: var(--ink-2);
}

.rf-lead-news img {
  width: 100%;
  aspect-ratio: 1100 / 700;
  object-fit: cover;
  transition: transform .8s var(--ease);
}

.rf-lead-news:hover img { transform: scale(1.04); }

.rf-lead-news__cap {
  position: absolute;
  inset: auto 0 0 0;
  padding: 2.4rem 1.6rem 1.5rem;
  background: linear-gradient(180deg, transparent, rgba(6, 8, 10, .95));
}

.rf-lead-news__cap time,
.rf-nitem time {
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--signal-2);
}

.rf-lead-news__cap h3 {
  margin-top: .5rem;
  font-size: clamp(1.1rem, 1.9vw, 1.4rem);
  font-weight: 800;
  line-height: 1.4;
}

.rf-news-list { border-top: 1px solid var(--line); }

.rf-nitem {
  display: block;
  padding: 1.15rem .2rem;
  border-bottom: 1px solid var(--line);
  transition: padding-left .26s var(--ease), background .26s var(--ease);
}

.rf-nitem:hover {
  padding-left: .7rem;
  background: linear-gradient(90deg, rgba(255, 90, 43, .07), transparent);
}

.rf-nitem h3 {
  margin-top: .3rem;
  font-size: .99rem;
  font-weight: 700;
  color: var(--ice);
  line-height: 1.5;
}

.rf-nitem p {
  margin-top: .35rem;
  font-size: .85rem;
  color: var(--ice-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.rf-nitem__tag {
  display: inline-block;
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--signal-2);
  border: 1px solid rgba(255, 90, 43, .3);
  padding: .05rem .45rem;
  margin-right: .55rem;
}

/* ---------- 斜切 CTA 带 ---------- */
.rf-cta {
  position: relative;
  background: var(--signal);
  color: #fff;
  clip-path: polygon(0 4.5rem, 100% 0, 100% 100%, 0 100%);
  margin-top: clamp(1rem, 3vw, 2rem);
  padding: clamp(4.6rem, 9vw, 7rem) 0 clamp(3.2rem, 6vw, 4.6rem);
}

.rf-cta::before {
  content: "";
  position: absolute;
  right: 4%;
  top: 22%;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(255, 255, 255, .25);
  transform: rotate(18deg);
  pointer-events: none;
}

.rf-cta__in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.rf-cta h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.25;
  max-width: 40rem;
}

.rf-cta p {
  margin-top: .7rem;
  font-size: .96rem;
  color: rgba(255, 255, 255, .86);
  max-width: 38rem;
}

.rf-cta .rf-btn--ice { color: var(--signal-deep); }

/* ---------- 内页页头 ---------- */
.rf-phead {
  position: relative;
  padding: clamp(2.6rem, 5.6vw, 4.4rem) 0 clamp(2rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.rf-phead::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(255, 90, 43, .16), transparent 68%);
  pointer-events: none;
}

.rf-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--ice-3);
}

.rf-crumb a:hover { color: var(--signal-2); }
.rf-crumb i { font-style: normal; color: var(--ink-4); }
.rf-crumb span { color: var(--ice-2); }

.rf-phead h1 {
  margin-top: 1rem;
  font-size: clamp(1.8rem, 4vw, 2.9rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.02em;
  max-width: 48rem;
}

.rf-phead__desc {
  margin-top: .9rem;
  max-width: 46rem;
  font-size: clamp(.95rem, 1.3vw, 1.04rem);
  color: var(--ice-2);
}

.rf-phead__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.8rem;
  margin-top: 1.7rem;
}

.rf-phead__stats div {
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--ice-3);
}

.rf-phead__stats b {
  display: block;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ice);
  letter-spacing: 0;
}

/* ---------- 通用文本块 ---------- */
.rf-prose {
  max-width: 52rem;
  font-size: 1rem;
  color: var(--ice-2);
}

.rf-prose h2,
.rf-prose h3 { color: var(--ice); }

.rf-prose h2 {
  font-size: clamp(1.35rem, 2.4vw, 1.7rem);
  font-weight: 800;
  margin: 2.4rem 0 .9rem;
  letter-spacing: -.01em;
}

.rf-prose h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 1.9rem 0 .7rem;
}

.rf-prose p { margin: .9rem 0; }
.rf-prose strong { color: var(--ice); }

.rf-prose a {
  color: var(--signal-2);
  border-bottom: 1px solid rgba(255, 125, 85, .35);
}

.rf-prose a:hover { color: var(--signal); }

.rf-prose ul,
.rf-prose ol {
  margin: 1rem 0;
  display: grid;
  gap: .55rem;
}

.rf-prose ul li {
  display: flex;
  gap: .7rem;
  font-size: .96rem;
}

.rf-prose ul li::before {
  content: "";
  flex: 0 0 auto;
  width: 16px;
  height: 1px;
  background: var(--signal);
  margin-top: .8rem;
}

.rf-prose ol { counter-reset: rf-ol; }

.rf-prose ol li {
  counter-increment: rf-ol;
  display: flex;
  gap: .7rem;
  font-size: .96rem;
}

.rf-prose ol li::before {
  content: counter(rf-ol, decimal-leading-zero);
  flex: 0 0 auto;
  font-size: .78rem;
  font-weight: 700;
  color: var(--signal);
  letter-spacing: .08em;
  padding-top: .2rem;
}

/* ---------- 双栏（文章 + 侧栏） ---------- */
.rf-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: clamp(1.6rem, 3.6vw, 3rem);
  align-items: start;
}

.rf-aside {
  position: sticky;
  top: 96px;
  display: grid;
  gap: 1rem;
}

.rf-panel {
  border: 1px solid var(--line);
  background: var(--ink-1);
  padding: 1.5rem 1.4rem;
}

.rf-panel h3 {
  font-size: .95rem;
  font-weight: 800;
  letter-spacing: .02em;
  padding-bottom: .8rem;
  border-bottom: 1px solid var(--line);
}

.rf-panel__list { margin-top: .8rem; display: grid; gap: .55rem; }

.rf-panel__list a {
  display: flex;
  justify-content: space-between;
  gap: .8rem;
  font-size: .88rem;
  color: var(--ice-2);
  border-bottom: 1px dashed rgba(255, 255, 255, .07);
  padding-bottom: .55rem;
}

.rf-panel__list a:hover { color: var(--signal-2); }
.rf-panel__list a span { color: var(--ice-3); font-size: .78rem; white-space: nowrap; }

.rf-panel--signal {
  background: linear-gradient(150deg, rgba(255, 90, 43, .16), rgba(255, 90, 43, .03));
  border-color: rgba(255, 90, 43, .28);
}

.rf-panel--signal p { font-size: .88rem; color: var(--ice-2); margin: .7rem 0 1.1rem; }

/* ---------- 表单 ---------- */
.rf-form {
  border: 1px solid var(--line);
  background: var(--ink-1);
  padding: clamp(1.5rem, 3vw, 2.4rem);
}

.rf-form__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 1.1rem;
}

.rf-field { display: grid; gap: .4rem; }
.rf-field--full { grid-column: 1 / -1; }

.rf-field label {
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--ice-2);
}

.rf-field label i {
  font-style: normal;
  color: var(--signal);
  margin-left: .2rem;
}

.rf-field input,
.rf-field select,
.rf-field textarea {
  width: 100%;
  padding: .82rem .9rem;
  background: var(--ink-0);
  border: 1px solid var(--line-2);
  color: var(--ice);
  font: inherit;
  font-size: .92rem;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.rf-field input:focus,
.rf-field select:focus,
.rf-field textarea:focus {
  outline: none;
  border-color: var(--signal);
  box-shadow: 0 0 0 3px rgba(255, 90, 43, .16);
}

.rf-field textarea { min-height: 120px; resize: vertical; }

.rf-field small { font-size: .76rem; color: var(--ice-3); }

.rf-check {
  display: flex;
  align-items: flex-start;
  gap: .6rem;
  font-size: .82rem;
  color: var(--ice-3);
  margin-top: 1rem;
}

.rf-check input { width: 16px; height: 16px; margin-top: .22rem; accent-color: var(--signal); }
.rf-check a { color: var(--signal-2); }

.rf-form__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

.rf-form__note { font-size: .8rem; color: var(--ice-3); }

.rf-formmsg {
  display: none;
  margin-top: 1rem;
  padding: .8rem 1rem;
  font-size: .88rem;
  border-left: 2px solid var(--mint);
  background: rgba(95, 227, 192, .08);
  color: var(--mint);
}

.rf-formmsg.is-show { display: block; }

.rf-formmsg.is-error { border-color: var(--signal); background: rgba(255, 90, 43, .08); color: var(--signal-2); }

/* ---------- 步骤条 ---------- */
.rf-steps {
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.rf-step {
  counter-increment: step;
  background: var(--ink-1);
  color: var(--ice);
  padding: 1.5rem 1.3rem;
  position: relative;
}

.rf-step p { color: var(--ice-3); }

/* 浅色区块内的 FAQ */
.rf-section--sheet .rf-faq,
.rf-section--sheet .rf-faq__item { border-color: rgba(16, 21, 27, .12); }

.rf-section--sheet .rf-faq__q { color: var(--dark-text); }
.rf-section--sheet .rf-faq__q:hover { color: var(--signal-deep); }
.rf-section--sheet .rf-faq__q i { color: var(--signal-deep); }
.rf-section--sheet .rf-faq__a { color: #5a6673; }

/* 浅色区块内的时间线 */
.rf-section--sheet .rf-timeline::before {
  background: linear-gradient(180deg, var(--signal-deep), rgba(199, 63, 22, .15));
}

.rf-section--sheet .rf-tl-item::before { background: var(--sheet); border-color: var(--signal-deep); }
.rf-section--sheet .rf-tl-item time { color: var(--signal-deep); }
.rf-section--sheet .rf-tl-item h3 { color: var(--dark-text); }
.rf-section--sheet .rf-tl-item p { color: #5a6673; }

/* 浅色区块内的三列卡 */
.rf-caps--light {
  border-color: rgba(16, 21, 27, .12);
  background: rgba(16, 21, 27, .12);
}

.rf-caps--light .rf-cap { background: #fff; }
.rf-caps--light .rf-cap:hover { background: #fbfcfd; }
.rf-caps--light .rf-cap h3 { color: var(--dark-text); }
.rf-caps--light .rf-cap p { color: #5a6673; }
.rf-caps--light .rf-cap__idx { color: var(--signal-deep); }

.rf-step::before {
  content: counter(step, decimal-leading-zero);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--signal);
}

.rf-step h3 { margin-top: .5rem; font-size: 1rem; font-weight: 800; }
.rf-step p { margin-top: .45rem; font-size: .86rem; color: var(--ice-3); }

/* ---------- FAQ 手风琴 ---------- */
.rf-faq { border-top: 1px solid var(--line); }

.rf-faq__item { border-bottom: 1px solid var(--line); }

.rf-faq__q {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.2rem;
  text-align: left;
  padding: 1.15rem .2rem;
  font-size: .99rem;
  font-weight: 700;
  color: var(--ice);
  transition: color .2s var(--ease);
}

.rf-faq__q:hover { color: var(--signal-2); }

.rf-faq__q i {
  flex: 0 0 auto;
  font-style: normal;
  font-size: .8rem;
  color: var(--signal);
  transition: transform .28s var(--ease);
  padding-top: .25rem;
}

.rf-faq__q[aria-expanded="true"] i { transform: rotate(45deg); }

.rf-faq__a {
  display: none;
  padding: 0 2.4rem 1.3rem .2rem;
  font-size: .93rem;
  color: var(--ice-2);
}

.rf-faq__a p + p { margin-top: .6rem; }
.rf-faq__item.is-open .rf-faq__a { display: block; }

/* ---------- 表格 ---------- */
.rf-table-wrap { overflow-x: auto; border: 1px solid var(--line); }

.rf-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
  min-width: 560px;
}

.rf-table th,
.rf-table td {
  padding: .9rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.rf-table th {
  background: var(--ink-2);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ice-2);
}

.rf-table td { color: var(--ice-2); }
.rf-table tr:last-child td { border-bottom: 0; }
.rf-table b { color: var(--ice); }

/* ---------- 时间线 ---------- */
.rf-timeline { position: relative; padding-left: 2rem; }

.rf-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--signal), rgba(255, 90, 43, .1));
}

.rf-tl-item { position: relative; padding-bottom: 1.8rem; }

.rf-tl-item::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: .55rem;
  width: 11px;
  height: 11px;
  background: var(--ink-0);
  border: 2px solid var(--signal);
}

.rf-tl-item time {
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--signal-2);
}

.rf-tl-item h3 { margin-top: .35rem; font-size: 1.05rem; font-weight: 800; }
.rf-tl-item p { margin-top: .4rem; font-size: .9rem; color: var(--ice-2); }

/* ---------- 文章页 ---------- */
.rf-article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  font-size: .8rem;
  color: var(--ice-3);
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.6rem;
}

.rf-article__meta span { display: inline-flex; align-items: center; gap: .4rem; }

.rf-article__fig { margin: 1.6rem 0 2rem; }

.rf-article__fig img { width: 100%; border: 1px solid var(--line); }

.rf-article__fig figcaption {
  margin-top: .6rem;
  font-size: .78rem;
  color: var(--ice-3);
  letter-spacing: .03em;
}

.rf-quote {
  margin: 1.8rem 0;
  padding: 1.3rem 1.5rem;
  border-left: 2px solid var(--signal);
  background: var(--ink-1);
  color: var(--ice);
  font-size: .98rem;
}

.rf-tags { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 2rem; }

.rf-tags a {
  font-size: .78rem;
  color: var(--ice-2);
  border: 1px solid var(--line-2);
  padding: .28rem .7rem;
  transition: .2s var(--ease);
}

.rf-tags a:hover { border-color: var(--signal); color: var(--signal-2); }

/* ---------- 联系页 ---------- */
.rf-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: clamp(1.6rem, 3.6vw, 3rem);
  align-items: start;
}

.rf-cinfo { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }

.rf-cinfo__row {
  background: var(--ink-1);
  padding: 1.3rem 1.4rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.rf-cinfo__row b {
  flex: 0 0 auto;
  width: 92px;
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--ice-3);
  font-weight: 600;
  padding-top: .15rem;
}

.rf-cinfo__row span { font-size: .93rem; color: var(--ice); }
.rf-cinfo__row small { display: block; font-size: .78rem; color: var(--ice-3); margin-top: .2rem; }

/* ---------- 404 ---------- */
.rf-404 {
  min-height: 62vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.rf-404__code {
  font-size: clamp(6rem, 20vw, 15rem);
  font-weight: 800;
  line-height: .85;
  letter-spacing: -.06em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 90, 43, .5);
}

.rf-404 h1 { margin-top: 1.4rem; font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 800; }
.rf-404 p { margin-top: .8rem; max-width: 34rem; color: var(--ice-2); }
.rf-404__act { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }

/* ---------- 页脚 ---------- */
.rf-foot {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-1), var(--ink-0));
  padding-top: clamp(2.8rem, 5vw, 4rem);
  position: relative;
  z-index: 1;
}

.rf-foot__top {
  display: grid;
  grid-template-columns: 1.5fr .8fr .8fr 1fr;
  gap: clamp(1.6rem, 3vw, 2.6rem);
  padding-bottom: 2.2rem;
}

.rf-foot__brand img { width: 168px; margin-bottom: 1rem; }
.rf-foot__brand p { font-size: .88rem; color: var(--ice-3); max-width: 24rem; }

.rf-foot__badges { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.1rem; }

.rf-foot__badges span {
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--ice-2);
  border: 1px solid var(--line-2);
  padding: .24rem .65rem;
}

.rf-foot__col h3 {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--ice-3);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.rf-foot__col li + li { margin-top: .55rem; }

.rf-foot__col a { font-size: .9rem; color: var(--ice-2); transition: color .2s var(--ease); }
.rf-foot__col a:hover { color: var(--signal-2); }
.rf-foot__col p { font-size: .88rem; color: var(--ice-3); margin-bottom: .6rem; }
.rf-foot__col strong { color: var(--ice); font-weight: 700; }

.rf-foot__kw {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .9rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: .8rem;
  color: var(--ice-3);
}

.rf-foot__kw a:hover { color: var(--signal-2); }
.rf-foot__kw b { color: var(--ice-2); font-weight: 600; letter-spacing: .04em; }

.rf-foot__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .8rem;
  padding: 1.3rem 0 1.6rem;
  font-size: .78rem;
  color: var(--ice-3);
}

.rf-foot__bottom a { border-bottom: 1px solid rgba(255, 255, 255, .12); }
.rf-foot__bottom a:hover { color: var(--signal-2); }

/* ---------- 回到顶部 ---------- */
.rf-top {
  position: fixed;
  right: 1.4rem;
  bottom: 1.4rem;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--ink-2);
  border: 1px solid var(--line-2);
  color: var(--ice);
  z-index: 45;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: .28s var(--ease);
}

.rf-top.is-show { opacity: 1; visibility: visible; transform: translateY(0); }
.rf-top:hover { border-color: var(--signal); color: var(--signal-2); }

/* ---------- 动效 ---------- */
.rf-reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}

.rf-reveal.is-in { opacity: 1; transform: none; }
.rf-reveal[data-d="1"] { transition-delay: .1s; }
.rf-reveal[data-d="2"] { transition-delay: .2s; }
.rf-reveal[data-d="3"] { transition-delay: .3s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rf-reveal { opacity: 1; transform: none; transition: none; }
  .rf-poster__frame img,
  .rf-gcard__media img,
  .rf-lead-news img { transition: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .rf-nav ul { gap: .8rem; }
  .rf-nav a { font-size: .9rem; }
  .rf-head__in { gap: 1.2rem; }
  .rf-cols { grid-template-columns: 1fr; }
  .rf-aside { position: static; }
  .rf-foot__top { grid-template-columns: 1.4fr 1fr 1fr; }
  .rf-foot__brand { grid-column: 1 / -1; }
}

@media (max-width: 920px) {
  .rf-burger { display: block; }

  .rf-nav {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(86vw, 360px);
    background: var(--ink-1);
    border-left: 1px solid var(--line);
    padding: 5.6rem 1.6rem 2rem;
    margin: 0;
    display: none;
    overflow-y: auto;
    z-index: 60;
  }

  .rf-nav.is-open {
    display: block;
    animation: rf-nav-in .34s var(--ease);
  }

  @keyframes rf-nav-in {
    from { transform: translateX(102%); }
    to { transform: none; }
  }

  .rf-nav ul { display: block; }

  .rf-nav li + li { border-top: 1px solid var(--line); }

  .rf-nav a { padding: .95rem .2rem; font-size: 1rem; }
  .rf-nav a::after { display: none; }
  .rf-nav a.is-on { color: var(--signal); }

  .rf-nav__foot {
    display: flex;
    gap: .7rem;
    margin-top: 1.6rem;
  }

  .rf-nav__foot .rf-btn { flex: 1; }

  .rf-body.is-locked { overflow: hidden; }

  .rf-hero__grid { grid-template-columns: 1fr; }
  .rf-poster { justify-self: start; width: min(100%, 440px); order: -1; }
  .rf-hero { padding-top: 1.6rem; }
  .rf-hero::after { display: none; }

  .rf-stats__grid { grid-template-columns: 1fr 1fr; }
  .rf-stats__item:nth-child(3) { border-left: 0; }
  .rf-stats__item:nth-child(3),
  .rf-stats__item:nth-child(4) { border-top: 1px solid var(--line); }

  .rf-caps { grid-template-columns: 1fr; }

  .rf-gcard,
  .rf-gcard:nth-child(even) { grid-template-columns: 1fr; gap: 1.3rem; }
  .rf-gcard:nth-child(even) .rf-gcard__media { order: 0; }
  .rf-gcard__media { max-width: 560px; }

  .rf-news-grid { grid-template-columns: 1fr; }

  .rf-steps { grid-template-columns: 1fr 1fr; }

  .rf-contact-grid { grid-template-columns: 1fr; }

  .rf-foot__top { grid-template-columns: 1fr 1fr; }
  .rf-foot__brand { grid-column: 1 / -1; }

  .rf-sec-head { flex-direction: column; align-items: flex-start; gap: 1rem; }

  .rf-cta { clip-path: polygon(0 2.2rem, 100% 0, 100% 100%, 0 100%); }
}

@media (max-width: 620px) {
  body { font-size: 15px; }
  .rf-strip__links { display: none; }
  .rf-strip__in { min-height: 34px; }
  .rf-head__in { min-height: 64px; }
  .rf-brand img { width: 146px; }
  .rf-head__act .rf-link-plain,
  .rf-head__act > .rf-btn { display: none; }

  .rf-hero h1 { font-size: 2rem; }
  .rf-hero__cta .rf-btn { flex: 1 1 auto; }
  .rf-hero__meta { gap: 1rem; }

  .rf-stats__grid { grid-template-columns: 1fr; }
  .rf-stats__item { border-left: 0; border-top: 1px solid var(--line); }
  .rf-stats__item:first-child { border-top: 0; }

  .rf-form__grid { grid-template-columns: 1fr; }
  .rf-steps { grid-template-columns: 1fr; }
  .rf-foot__top { grid-template-columns: 1fr; }
  .rf-foot__bottom { flex-direction: column; align-items: flex-start; }
  .rf-phead__stats { gap: 1.2rem; }
  .rf-cinfo__row { flex-direction: column; gap: .3rem; }
  .rf-cinfo__row b { width: auto; }
  .rf-faq__a { padding-right: .4rem; }
  .rf-gcard__facts { gap: 1rem; }
  .rf-cta::before { display: none; }
}