/* =========================================================
   DOLF: Last Stand — 门户落地页
   暗色 · 西欧中世纪 × 科技感混搭
   ========================================================= */

:root {
  --bg:        #07080c;
  --bg-2:      #0b0e16;
  --panel:     rgba(18, 22, 33, 0.62);
  --panel-2:   rgba(26, 31, 45, 0.55);
  --line:      rgba(126, 146, 186, 0.16);
  --line-soft: rgba(126, 146, 186, 0.09);
  --text:      #e9eef8;
  --muted:     #9aa6bd;
  --gold:      #e8c474;   /* 中世纪金 */
  --gold-dim:  #b9933f;
  --cyan:      #46e3ff;   /* 科技青 */
  --violet:    #a855f7;
  --radius:    14px;
  --shadow:    0 24px 60px -28px rgba(0, 0, 0, 0.85);
  --font-display: 'Cinzel', 'Times New Roman', Georgia, serif;
  --font-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --font-cn-serif: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  --maxw: 1180px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-cn);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ---------- 按钮 ---------- */
.btn {
  --bg-btn: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.06em;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--bg-btn);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s cubic-bezier(.2,.8,.2,1), box-shadow 0.25s, border-color 0.25s, background 0.25s;
}
.btn--sm { padding: 9px 20px; font-size: 13.5px; }
.btn--lg { padding: 16px 44px; font-size: 17px; }

.btn--primary {
  border-color: transparent;
  color: #0a0c12;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold) 0%, #f4d98c 45%, var(--cyan) 130%);
  box-shadow: 0 0 0 1px rgba(232,196,116,0.4), 0 10px 30px -10px rgba(70,227,255,0.45);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 26px rgba(70,227,255,0.55), 0 14px 34px -10px rgba(232,196,116,0.5);
}
.btn--ghost {
  border-color: var(--line);
  background: var(--panel);
  color: var(--text);
  backdrop-filter: blur(6px);
}
.btn--ghost:hover {
  border-color: rgba(70,227,255,0.5);
  transform: translateY(-2px);
  box-shadow: 0 0 22px -6px rgba(70,227,255,0.4);
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(7, 8, 12, 0.72);
  backdrop-filter: blur(12px) saturate(120%);
  border-bottom: 1px solid var(--line-soft);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  height: 66px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.nav__brand-mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  letter-spacing: 0.18em;
  color: var(--text);
  text-shadow: 0 0 18px rgba(70,227,255,0.35);
}
.nav__links {
  display: flex;
  gap: 30px;
  margin-left: auto;
  margin-right: 8px;
}
.nav__links a {
  font-size: 14.5px;
  color: var(--muted);
  letter-spacing: 0.04em;
  position: relative;
  padding: 4px 0;
  transition: color 0.2s;
}
.nav__links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 1.5px;
  background: linear-gradient(90deg, var(--gold), var(--cyan));
  transition: width 0.25s;
}
.nav__links a:hover { color: var(--text); }
.nav__links a:hover::after { width: 100%; }
.nav__actions { display: flex; align-items: center; gap: 12px; }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 38px; height: 34px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav__toggle span {
  width: 18px; height: 1.8px;
  background: var(--text);
  transition: transform 0.25s, opacity 0.25s;
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.8px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.8px) rotate(-45deg); }

/* ---------- Hero 首屏 ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 90px 20px 60px;
}
.hero__bg { position: absolute; inset: 0; z-index: 0; }
.hero__grid {
  position: absolute; inset: -20%;
  background-image:
    linear-gradient(rgba(70,227,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(70,227,255,0.06) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 42%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 42%, #000 30%, transparent 78%);
  transform: perspective(600px) rotateX(58deg) translateY(8%) scale(1.4) translate(var(--px, 0px), var(--py, 0px));
  opacity: 0.7;
}
.hero__fx { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__scan {
  position: absolute; inset: 0;
  background: repeating-linear-gradient(0deg, rgba(255,255,255,0.025) 0 1px, transparent 1px 3px);
  mix-blend-mode: overlay;
  opacity: 0.5;
  pointer-events: none;
}
.hero__vignette {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 65% at 50% 38%, transparent 40%, rgba(7,8,12,0.78) 100%),
    linear-gradient(180deg, rgba(7,8,12,0.55) 0%, transparent 22%, transparent 70%, var(--bg) 100%);
}
.hero__content { position: relative; z-index: 2; max-width: 860px; }
.hero__kicker {
  font-family: var(--font-display);
  letter-spacing: 0.5em;
  font-size: 13px;
  color: var(--gold);
  margin-bottom: 18px;
  text-indent: 0.5em;
  opacity: 0;
  animation: fadeUp 0.9s 0.1s forwards;
}
.hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(76px, 18vw, 200px);
  line-height: 0.92;
  letter-spacing: 0.04em;
  color: #f6f9ff;
  position: relative;
  background: linear-gradient(180deg, #ffffff 0%, #cfe6ff 55%, #7fb6d8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 34px rgba(70,227,255,0.45)) drop-shadow(0 4px 18px rgba(0,0,0,0.6));
  opacity: 0;
  animation: fadeUp 1s 0.22s forwards;
}
/*  carved gold edge echo  */
.hero__title::before {
  content: attr(data-text);
  position: absolute; inset: 0;
  -webkit-text-fill-color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  background: none;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(232,196,116,0.35);
  z-index: -1;
}
.hero__subtitle {
  font-family: var(--font-cn-serif);
  font-size: clamp(20px, 4vw, 34px);
  letter-spacing: 0.28em;
  color: var(--gold);
  margin-top: 14px;
  text-shadow: 0 0 22px rgba(232,196,116,0.4);
  opacity: 0;
  animation: fadeUp 1s 0.4s forwards;
}
.hero__tagline {
  margin-top: 16px;
  color: var(--muted);
  font-size: clamp(13px, 2vw, 16px);
  letter-spacing: 0.08em;
  opacity: 0;
  animation: fadeUp 1s 0.56s forwards;
}
.hero__cta {
  margin-top: 34px;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 1s 0.72s forwards;
}
.hero__scroll {
  position: absolute;
  left: 50%; bottom: 26px;
  transform: translateX(-50%);
  z-index: 3;
  width: 26px; height: 44px;
  border: 1px solid var(--line);
  border-radius: 14px;
  display: flex; justify-content: center;
}
.hero__scroll-line {
  width: 3px; height: 10px;
  margin-top: 8px;
  border-radius: 2px;
  background: linear-gradient(var(--cyan), transparent);
  animation: scrollDot 1.6s infinite;
}

/* ---------- 通用 section ---------- */
.section {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 110px 24px;
}
.section__head { text-align: center; margin-bottom: 56px; }
.section__kicker {
  font-family: var(--font-display);
  letter-spacing: 0.42em;
  font-size: 12px;
  color: var(--cyan);
  margin-bottom: 12px;
  opacity: 0.85;
}
.section__title {
  font-family: var(--font-cn);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 44px);
  letter-spacing: 0.04em;
  position: relative;
  display: inline-block;
}
.section__title::after {
  content: '';
  position: absolute;
  left: 50%; bottom: -14px;
  transform: translateX(-50%);
  width: 64px; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}
.section__lead {
  margin-top: 26px;
  color: var(--muted);
  font-size: 15.5px;
  max-width: 620px;
  margin-left: auto; margin-right: auto;
}

/* ---------- 核心玩法 ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feature {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 24px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
  transition: transform 0.3s cubic-bezier(.2,.8,.2,1), border-color 0.3s, box-shadow 0.3s;
}
.feature::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(120% 120% at 50% -20%, rgba(70,227,255,0.12), transparent 55%);
  opacity: 0; transition: opacity 0.3s;
}
.feature:hover {
  transform: translateY(-8px);
  border-color: rgba(70,227,255,0.45);
  box-shadow: var(--shadow), 0 0 30px -10px rgba(70,227,255,0.4);
}
.feature:hover::before { opacity: 1; }
.feature__icon {
  width: 50px; height: 50px;
  color: var(--gold);
  margin-bottom: 18px;
  filter: drop-shadow(0 0 10px rgba(232,196,116,0.4));
}
.feature__title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.03em;
  margin-bottom: 10px;
}
.feature__desc { color: var(--muted); font-size: 14px; line-height: 1.7; }
.feature__no {
  position: absolute; top: 16px; right: 18px;
  font-family: var(--font-display);
  font-size: 13px; color: var(--line);
  letter-spacing: 0.1em;
}

/* ---------- 英雄横幅 ---------- */
.section--heroes { max-width: 100%; padding-left: 0; padding-right: 0; }
.section--heroes .section__head { max-width: var(--maxw); margin-left: auto; margin-right: auto; padding: 0 24px; }
.marquee {
  position: relative;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee__track {
  display: flex;
  gap: 18px;
  width: max-content;
  padding: 10px 18px;
  animation: marquee 42s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
.hero-card {
  width: 210px;
  flex: 0 0 auto;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  transition: transform 0.35s cubic-bezier(.2,.8,.2,1), border-color 0.35s, box-shadow 0.35s;
}
.hero-card:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: var(--accent, var(--cyan));
  box-shadow: 0 18px 44px -20px rgba(0,0,0,0.9), 0 0 26px -8px var(--accent, var(--cyan));
}
.hero-card__art {
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 50% 30%, rgba(255,255,255,0.05), transparent 60%), #0a0d15;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.hero-card__art img {
  width: 100%; height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 8px 18px rgba(0,0,0,0.6));
  transition: transform 0.4s;
}
.hero-card:hover .hero-card__art img { transform: scale(1.07); }
.hero-card__tag {
  position: absolute; top: 10px; left: 10px;
  font-size: 11px; letter-spacing: 0.08em;
  padding: 3px 10px; border-radius: 999px;
  background: rgba(7,8,12,0.7);
  border: 1px solid var(--accent, var(--line));
  color: var(--accent, var(--text));
  backdrop-filter: blur(4px);
}
.hero-card__body { padding: 14px 16px 18px; }
.hero-card__name {
  font-size: 17px; font-weight: 700;
  display: flex; align-items: baseline; gap: 8px;
}
.hero-card__real {
  font-family: var(--font-display);
  font-size: 12px; color: var(--muted);
  letter-spacing: 0.05em;
}
.hero-card__role { color: var(--muted); font-size: 12.5px; margin-top: 4px; letter-spacing: 0.03em; }

/* ---------- 最新动态 ---------- */
.news { display: grid; gap: 16px; }
.news-item {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 22px;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  padding: 22px 26px;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.news-item:hover {
  border-left-color: var(--cyan);
  transform: translateX(4px);
  box-shadow: var(--shadow);
}
.news-item__ver {
  font-family: var(--font-display);
  font-weight: 700; font-size: 20px;
  color: var(--gold);
}
.news-item__date { color: var(--muted); font-size: 12.5px; margin-top: 4px; letter-spacing: 0.04em; }
.news-item__title { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.news-item__desc { color: var(--muted); font-size: 14px; line-height: 1.7; }

/* 显示更多 */
.news__more { display: flex; justify-content: center; margin-top: 26px; }

/* ---------- 更新浮窗 ---------- */
.modal {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  visibility: hidden; opacity: 0;
  transition: opacity 0.28s, visibility 0.28s;
}
.modal.open { visibility: visible; opacity: 1; }
.modal__backdrop {
  position: absolute; inset: 0;
  background: rgba(4, 5, 9, 0.78);
  backdrop-filter: blur(6px);
}
.modal__panel {
  position: relative;
  width: min(760px, 100%);
  max-height: 86vh;
  overflow-y: auto;
  background: linear-gradient(180deg, rgba(18,22,33,0.97), rgba(11,14,22,0.97));
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow), 0 0 50px -16px rgba(70,227,255,0.35);
  padding: 30px 30px 26px;
  transform: translateY(16px) scale(0.98);
  transition: transform 0.28s cubic-bezier(.2,.8,.2,1);
}
.modal.open .modal__panel { transform: none; }
.modal__close {
  position: absolute; top: 14px; right: 16px;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-size: 22px; line-height: 1;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, transform 0.2s;
}
.modal__close:hover { color: var(--text); border-color: rgba(70,227,255,0.5); transform: rotate(90deg); }
.modal__head { text-align: center; margin-bottom: 22px; }
.modal__title { font-size: 24px; font-weight: 700; letter-spacing: 0.04em; margin-top: 8px; }
.modal__sub { color: var(--muted); font-size: 12.5px; margin-top: 8px; letter-spacing: 0.03em; }
.modal__list { display: grid; gap: 14px; }
.modal .news-item { transform: none; opacity: 1; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line-soft); background: linear-gradient(180deg, transparent, rgba(11,14,22,0.6)); }
.footer__cta { text-align: center; padding: 110px 24px 80px; max-width: 720px; margin: 0 auto; }
.footer__title {
  font-family: var(--font-cn);
  font-size: clamp(26px, 5vw, 40px);
  font-weight: 700; letter-spacing: 0.04em;
}
.footer__sub { color: var(--muted); margin: 16px 0 32px; font-size: 15px; letter-spacing: 0.04em; }
.footer__download { margin-top: 26px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.chip {
  font-size: 13px; padding: 8px 18px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted);
  background: var(--panel);
}
.chip--soon { border-style: dashed; opacity: 0.85; }

.footer__bar {
  max-width: var(--maxw); margin: 0 auto;
  padding: 26px 24px 40px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 18px; flex-wrap: wrap;
  border-top: 1px solid var(--line-soft);
}
.footer__brand { display: flex; align-items: center; gap: 14px; }
.footer__mark { font-family: var(--font-display); font-weight: 900; font-size: 20px; letter-spacing: 0.18em; color: var(--text); }
.footer__copy { color: var(--muted); font-size: 12.5px; letter-spacing: 0.03em; }
.footer__social { display: flex; gap: 12px; }
.social-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted);
  font-size: 13px; letter-spacing: 0.03em;
  transition: color 0.25s, border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}
.social-btn svg { width: 17px; height: 17px; }
.social-btn:hover {
  color: var(--text);
  border-color: rgba(70,227,255,0.5);
  transform: translateY(-2px);
  box-shadow: 0 0 20px -8px rgba(70,227,255,0.5);
}

/* ---------- 滚动入场 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s cubic-bezier(.2,.8,.2,1), transform 0.7s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Keyframes ---------- */
@keyframes fadeUp { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@keyframes scrollDot { 0% { transform: translateY(0); opacity: 1; } 60% { opacity: 0.2; } 100% { transform: translateY(14px); opacity: 0; } }

/* ---------- 响应式 ---------- */
@media (max-width: 1023px) {
  .features { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767px) {
  .nav__links {
    position: fixed;
    inset: 66px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: rgba(7,8,12,0.96);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line-soft);
    padding: 8px 0;
    transform: translateY(-120%);
    transition: transform 0.3s;
    margin: 0;
  }
  .nav__links.open { transform: translateY(0); }
  .nav__links a { padding: 14px 24px; font-size: 16px; border-bottom: 1px solid var(--line-soft); }
  .nav__links a::after { display: none; }
  .nav__toggle { display: flex; }
  .nav__actions .btn--sm { display: none; }
  .features { grid-template-columns: 1fr; }
  .section { padding: 80px 20px; }
  .news-item { grid-template-columns: 1fr; gap: 8px; }
  .footer__bar { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .marquee__track { animation: none; }
  .hero__kicker, .hero__title, .hero__subtitle, .hero__tagline, .hero__cta { opacity: 1; animation: none; }
}