:root {
  --ink: #f5f1e6;
  --muted: #b9c5b1;
  --field: #07100d;
  --field-soft: #0d1a15;
  --leaf: #68e08d;
  --amber: #f4b35c;
  --rust: #c36f3e;
  --steel: #7aa7b8;
  --line: rgba(245, 241, 230, 0.16);
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.36);
  --wrap: min(1180px, calc(100vw - 36px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--field);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", "Bahnschrift", sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    linear-gradient(rgba(245, 241, 230, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 241, 230, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  opacity: 0.45;
  z-index: -2;
}

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

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

button {
  font: inherit;
}

#fx {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.45;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: var(--wrap);
  margin: 18px auto 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: rgba(7, 16, 13, 0.72);
  backdrop-filter: blur(18px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--leaf);
  color: #06100c;
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 1rem;
}

.brand small {
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav a:hover {
  color: var(--ink);
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: end;
  padding: 150px max(18px, calc((100vw - 1180px) / 2)) 56px;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(7, 16, 13, 0.86), rgba(7, 16, 13, 0.38) 52%, rgba(7, 16, 13, 0.88)),
    linear-gradient(0deg, var(--field) 0%, rgba(7, 16, 13, 0.22) 36%),
    url("https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/2507950/ss_93b016dd309b10dc0455ce11fd0f3b270343dc13.1920x1080.jpg"),
    url("../assets/delta-force-hero.jpg");
  background-size: cover;
  background-position: center;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 5px);
  opacity: 0.18;
}

.hero-copy {
  max-width: 820px;
}

.eyebrow,
.kicker {
  margin: 0 0 12px;
  color: var(--leaf);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(4rem, 12vw, 8.6rem);
  line-height: 0.92;
}

.hero-title {
  margin: 18px 0 0;
  color: var(--amber);
  font-size: clamp(1.35rem, 4vw, 2.2rem);
  font-weight: 900;
}

.hero-lead {
  max-width: 760px;
  margin: 16px 0 0;
  color: #e8eddf;
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 850;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: #07100d;
  background: var(--leaf);
}

.button.ghost {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(245, 241, 230, 0.06);
}

.hero-status {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 48px;
}

.hero-status span,
.tag-row span {
  border: 1px solid rgba(104, 224, 141, 0.28);
  background: rgba(7, 16, 13, 0.7);
  color: #dbffe4;
  padding: 8px 12px;
  font-size: 0.9rem;
}

.section,
.proof-band,
.promise,
.contact,
.footer {
  width: var(--wrap);
  margin: 0 auto;
}

.section,
.proof-band,
.contact {
  padding: 76px 0;
}

.section-head {
  display: grid;
  gap: 8px;
  max-width: 780px;
  margin-bottom: 24px;
}

.section-head h2,
.promise h2,
.contact h2 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.45rem);
  line-height: 1.04;
}

.section-head p:not(.kicker),
.wide-copy,
.contact-copy p:not(.kicker) {
  margin: 0;
  color: var(--muted);
}

.wide-copy {
  max-width: 920px;
  font-size: 1.08rem;
}

.feature-grid,
.package-grid,
.guarantee-grid,
.qr-grid {
  display: grid;
  gap: 16px;
}

.feature-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 26px;
}

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

.feature-card,
.package-card,
.guarantee-grid article,
.qr-card {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 35, 28, 0.92), rgba(8, 18, 14, 0.96));
  box-shadow: var(--shadow);
}

.feature-card,
.guarantee-grid article {
  padding: 22px;
}

.feature-card strong,
.guarantee-grid strong,
.qr-card span {
  display: block;
  color: var(--amber);
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.feature-card p,
.guarantee-grid p,
.package-card p {
  margin: 0;
  color: var(--muted);
}

.package-card {
  position: relative;
  overflow: hidden;
  padding: 24px;
}

.package-card.featured {
  border-color: rgba(244, 179, 92, 0.55);
}

.package-card h3 {
  margin: 0;
  font-size: 1.45rem;
}

.package-badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 5px 10px;
  background: var(--rust);
  color: #fff7ed;
  font-size: 0.78rem;
  font-weight: 900;
}

.price-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 18px 0;
  list-style: none;
}

.price-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 12px;
  background: rgba(245, 241, 230, 0.06);
  border: 1px solid rgba(245, 241, 230, 0.1);
}

.price-list strong {
  color: var(--leaf);
  white-space: nowrap;
}

.proof-band {
  padding-top: 70px;
}

.proof-frame {
  margin: 0;
  border: 1px solid rgba(122, 167, 184, 0.36);
  background: #050908;
  box-shadow: var(--shadow);
}

.proof-frame img {
  width: 100%;
}

.promise {
  padding: 64px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.promise h2 {
  max-width: 920px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 22px;
  align-items: start;
}

.contact-copy {
  align-self: center;
}

.contact-panel,
.qr-card {
  padding: 18px;
}

.contact-panel {
  display: grid;
  gap: 12px;
  border: 1px solid var(--line);
  background: rgba(18, 35, 28, 0.88);
  box-shadow: var(--shadow);
}

.contact-code {
  padding: 15px 14px;
  border: 1px solid rgba(104, 224, 141, 0.24);
  color: var(--leaf);
  background: rgba(0, 0, 0, 0.22);
  text-align: center;
  font-weight: 900;
  overflow-wrap: anywhere;
}

.qr-grid {
  grid-column: 1 / -1;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.qr-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  background: rgba(255, 255, 255, 0.04);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  padding: 34px 0 46px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  padding: 12px 14px;
  border: 1px solid rgba(104, 224, 141, 0.32);
  background: rgba(7, 16, 13, 0.96);
  color: var(--ink);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 30;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .site-header {
    margin-top: 10px;
  }

  .nav {
    display: none;
  }

  .hero {
    min-height: 88vh;
    padding-top: 120px;
  }

  .feature-grid,
  .package-grid,
  .guarantee-grid,
  .contact,
  .qr-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  :root {
    --wrap: min(100vw - 24px, 1180px);
  }

  .hero {
    padding-bottom: 40px;
  }

  .hero h1 {
    font-size: 4.2rem;
  }

  .section,
  .proof-band,
  .contact {
    padding: 52px 0;
  }
}