/* VR Link — enterprise landing + hero motion + i18n */

:root {
  --color-bg: #f4f6f9;
  --color-surface: #ffffff;
  --color-text: #1c2333;
  --color-text-muted: #5c6578;
  --color-border: #e2e6ee;
  --color-primary: #0f3d6b;
  --color-primary-hover: #0a2d52;
  --color-accent: #0d7c8a;
  --color-accent-soft: rgba(13, 124, 138, 0.1);
  --stroke-strong: rgba(15, 61, 107, 0.22);
  --android: #3ddc84;
  --radius-lg: 16px;
  --radius-md: 10px;
  --shadow-sm: 0 1px 2px rgba(28, 35, 51, 0.06);
  --shadow-md: 0 8px 24px rgba(28, 35, 51, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 61, 107, 0.12);
  --font-sans: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    system-ui, sans-serif;
  --max-width: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 1000;
  padding: 10px 16px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 8px;
  font-weight: 600;
}

.skip-link:focus {
  left: 12px;
  text-decoration: none;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  padding-left: max(24px, env(safe-area-inset-left));
  padding-right: max(24px, env(safe-area-inset-right));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: relative;
  z-index: 210;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-text);
}

.brand:hover {
  text-decoration: none;
  opacity: 0.9;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(145deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: -0.02em;
}

.brand-text {
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.nav > a:not(.btn) {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  padding: 8px 12px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
}

.nav > a:not(.btn):hover {
  color: var(--color-primary);
  background: rgba(15, 61, 107, 0.06);
  text-decoration: none;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  padding: 3px;
  margin-left: 4px;
  margin-right: 4px;
  border-radius: 999px;
  background: rgba(28, 35, 51, 0.06);
  border: 1px solid var(--color-border);
}

.lang-btn {
  margin: 0;
  padding: 6px 12px;
  border: none;
  border-radius: 999px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
  background: transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.lang-btn:hover {
  color: var(--color-text);
}

.lang-btn[aria-pressed="true"] {
  background: #fff;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.lang-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.nav-toggle {
  display: none;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin: 0;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.nav-toggle:hover {
  background: rgba(15, 61, 107, 0.05);
  border-color: rgba(15, 61, 107, 0.2);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  box-shadow: 0 -6px 0 currentColor, 0 6px 0 currentColor;
}

.site-header.is-nav-open .nav-toggle__bars {
  box-shadow: none;
  transform: rotate(45deg);
}

.site-header.is-nav-open .nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transform: rotate(-90deg);
}

.header-lang-scroll {
  min-width: 0;
}

.nav-backdrop {
  display: block;
  position: fixed;
  inset: 0;
  z-index: 180;
  margin: 0;
  padding: 0;
  border: none;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.22s ease, visibility 0.22s ease;
}

.nav-backdrop:not([hidden]) {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

@media (min-width: 768px) {
  .header-inner {
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 20px;
  }

  .header-panel {
    flex: 1;
    display: flex;
    justify-content: center;
    min-width: 0;
  }

  .nav--primary {
    justify-content: center;
  }

  .header-lang-scroll {
    flex-shrink: 0;
    margin-left: auto;
  }

  .nav-backdrop {
    display: none !important;
  }
}

@media (max-width: 767.98px) {
  /*
   * backdrop-filter on .site-header creates a containing block for position:fixed
   * children in Blink/WebKit — the drawer would anchor to the short header instead
   * of the viewport. Drop the blur on small screens so #header-panel covers the full height.
   */
  .site-header {
    z-index: 200;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(255, 255, 255, 0.98);
  }

  .header-inner {
    flex-wrap: wrap;
    align-items: center;
    row-gap: 8px;
    column-gap: 10px;
    padding: 8px max(12px, env(safe-area-inset-right)) 8px max(12px, env(safe-area-inset-left));
    padding-top: max(8px, env(safe-area-inset-top));
  }

  .brand {
    flex: 0 0 auto;
    gap: 8px;
    position: relative;
    z-index: 260;
    max-width: calc(100% - 56px);
    order: 1;
  }

  .brand-text {
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    border-radius: 8px;
    font-size: 12px;
  }

  .nav-toggle {
    display: inline-flex;
    order: 2;
    margin-left: auto;
    position: relative;
    z-index: 260;
  }

  .header-inner > .header-lang-scroll {
    order: 3;
    flex: 1 1 100%;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    position: relative;
    z-index: 260;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    mask-image: linear-gradient(90deg, transparent 0, #000 12px, #000 calc(100% - 12px), transparent);
    padding: 2px 0;
  }

  .header-inner > .header-lang-scroll::-webkit-scrollbar {
    display: none;
  }

  /* 菜单打开时语言条由 JS 移入面板，避免叠在半屏遮罩上 */
  .header-panel > .header-lang-scroll {
    order: 0;
    flex: none;
    width: 100%;
    max-width: none;
    min-width: 0;
    margin: 0 0 16px;
    padding: 0;
    position: relative;
    z-index: auto;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    mask-image: linear-gradient(90deg, transparent 0, #000 10px, #000 calc(100% - 10px), transparent);
  }

  .header-panel > .header-lang-scroll::-webkit-scrollbar {
    display: none;
  }

  .lang-switch {
    flex-shrink: 0;
    margin-left: 0;
    margin-right: 0;
    padding: 2px;
  }

  .lang-btn {
    padding: 5px 10px;
    font-size: 12px;
    white-space: nowrap;
  }

  .header-panel {
    position: fixed;
    z-index: 250;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    width: 100%;
    max-width: none;
    height: 100vh;
    height: 100dvh;
    min-height: -webkit-fill-available;
    margin: 0;
    padding: calc(72px + env(safe-area-inset-top)) max(16px, env(safe-area-inset-left)) max(
        24px,
        env(safe-area-inset-bottom)
      )
      max(16px, env(safe-area-inset-right));
    box-sizing: border-box;
    background: var(--color-surface);
    border-left: none;
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    transform: translate3d(100%, 0, 0);
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.26s cubic-bezier(0.22, 1, 0.36, 1), visibility 0.26s;
    order: 10;
  }

  .site-header.is-nav-open .header-panel {
    transform: translate3d(0, 0, 0);
    visibility: visible;
    pointer-events: auto;
  }

  .nav--primary {
    flex-direction: column;
    align-items: stretch;
    flex-wrap: nowrap;
    gap: 6px;
  }

  .nav--primary > a:not(.btn) {
    padding: 14px 14px;
    font-size: 1rem;
    border-radius: 10px;
  }

  .nav-contact-btn {
    margin-left: 0 !important;
    margin-top: 10px;
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  .wrap-hero {
    padding: 22px max(16px, env(safe-area-inset-left)) 36px max(16px, env(safe-area-inset-right));
  }

  .hero-grid {
    gap: 22px;
  }

  .hero-visual {
    min-height: 260px;
  }

  .hero-tech {
    min-height: 260px;
  }

  .hero-lead {
    font-size: 1rem;
  }

  .hero-cta {
    margin-bottom: 14px;
  }

  .section {
    padding: 28px max(16px, env(safe-area-inset-left)) 28px max(16px, env(safe-area-inset-right));
  }

  .guide-section {
    scroll-margin-top: 108px;
  }

  .contact-inner {
    padding: 28px max(16px, env(safe-area-inset-left)) 32px max(16px, env(safe-area-inset-right));
  }

  .site-footer {
    padding: 24px max(16px, env(safe-area-inset-left)) 32px max(16px, env(safe-area-inset-right));
  }
}

@media (max-width: 767.98px) and (prefers-reduced-motion: reduce) {
  .header-panel {
    transition: none;
  }

  .nav-backdrop {
    transition: none;
  }
}

.back-to-top {
  position: fixed;
  right: max(16px, env(safe-area-inset-right));
  bottom: max(20px, env(safe-area-inset-bottom));
  z-index: 90;
  width: 48px;
  height: 48px;
  margin: 0;
  padding: 0;
  display: grid;
  place-items: center;
  border-radius: 14px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  color: var(--color-primary);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.back-to-top:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.back-to-top:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.back-to-top__icon {
  display: block;
  width: 12px;
  height: 12px;
  margin-top: 3px;
  border-left: 2.5px solid currentColor;
  border-top: 2.5px solid currentColor;
  transform: rotate(45deg);
}

.back-to-top[hidden] {
  display: none !important;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9375rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  background: rgba(15, 61, 107, 0.04);
  text-decoration: none;
}

.btn-app-store {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.btn-app-store .apple-icon {
  flex-shrink: 0;
  opacity: 0.95;
}

.btn-nav-contact {
  margin-left: 4px;
  padding: 10px 18px;
  border-radius: 999px;
  color: #fff !important;
  text-decoration: none !important;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  background: linear-gradient(125deg, #2e9f7a 0%, #0d8fbf 48%, #6b5bca 100%);
  box-shadow: 0 10px 28px rgba(14, 116, 144, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.btn-nav-contact:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 34px rgba(14, 116, 144, 0.36);
  filter: brightness(1.03);
  text-decoration: none !important;
}

.btn-nav-contact:focus-visible {
  outline-color: #6b5bca;
}

.wrap-hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 56px 24px 64px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 48px;
    align-items: stretch;
  }
}

.eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

.hero-lead {
  margin: 0 0 24px;
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 36em;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.hero-note {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}

.hero-visual {
  position: relative;
  min-height: 320px;
}

@media (min-width: 960px) {
  .hero-visual {
    min-height: 420px;
  }
}

.hero-tech {
  position: relative;
  height: 100%;
  min-height: 320px;
  border-radius: calc(var(--radius-lg) + 4px);
  background: radial-gradient(ellipse 85% 65% at 50% 20%, rgba(13, 124, 138, 0.14), transparent 55%),
    radial-gradient(ellipse 50% 40% at 90% 80%, rgba(107, 91, 202, 0.12), transparent 45%),
    linear-gradient(165deg, #0c1524 0%, #121c2e 42%, #0e1829 100%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.hero-tech__glow {
  position: absolute;
  width: 140%;
  height: 60%;
  left: -20%;
  top: -20%;
  background: radial-gradient(circle, rgba(61, 220, 132, 0.18), transparent 62%);
  animation: hero-glow-shift 8s ease-in-out infinite;
  pointer-events: none;
}

@keyframes hero-glow-shift {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.9;
  }
  50% {
    transform: translate(6%, 4%) scale(1.05);
    opacity: 1;
  }
}

.hero-tech__grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 75% 70% at 50% 45%, black 0%, transparent 72%);
  animation: grid-pan 22s linear infinite;
  pointer-events: none;
}

@keyframes grid-pan {
  0% {
    background-position: 0 0, 0 0;
  }
  100% {
    background-position: 0 28px, 28px 0;
  }
}

.hero-orbit {
  position: absolute;
  right: 8%;
  top: 14%;
  width: min(42vw, 220px);
  height: min(42vw, 220px);
  z-index: 2;
  pointer-events: none;
}

@media (min-width: 960px) {
  .hero-orbit {
    right: 6%;
    top: 12%;
    width: 220px;
    height: 220px;
  }
}

.hero-orbit__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px dashed rgba(61, 220, 132, 0.35);
  animation: orbit-spin 16s linear infinite;
}

@keyframes orbit-spin {
  to {
    transform: rotate(360deg);
  }
}

.hero-orbit__dot {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--android);
  box-shadow: 0 0 14px rgba(61, 220, 132, 0.75);
}

.hero-orbit__dot--a {
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: dot-orbit 9s linear infinite;
}

.hero-orbit__dot--b {
  bottom: 8%;
  right: 0;
  animation: dot-pulse 2.4s ease-in-out infinite;
}

@keyframes dot-orbit {
  0% {
    transform: translate(-50%, -50%) rotate(0deg) translateX(110px) rotate(0deg);
  }
  100% {
    transform: translate(-50%, -50%) rotate(360deg) translateX(110px) rotate(-360deg);
  }
}

@keyframes dot-pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.25);
    opacity: 0.75;
  }
}

.hero-orbit__core {
  position: absolute;
  inset: 22%;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(61, 220, 132, 0.25);
  display: grid;
  place-items: center;
  box-shadow: inset 0 0 24px rgba(61, 220, 132, 0.12);
}

.hero-android {
  width: 52%;
  height: auto;
  color: var(--android);
  filter: drop-shadow(0 0 12px rgba(61, 220, 132, 0.45));
}

.hero-terminal {
  position: absolute;
  left: 6%;
  right: 6%;
  bottom: 8%;
  z-index: 3;
  border-radius: 14px;
  background: rgba(10, 14, 22, 0.72);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
  overflow: hidden;
}

.hero-terminal__bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: rgba(0, 0, 0, 0.35);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-terminal__dots {
  display: flex;
  gap: 5px;
}

.hero-terminal__dots i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ff5f56;
}
.hero-terminal__dots i:nth-child(2) {
  background: #ffbd2e;
}
.hero-terminal__dots i:nth-child(3) {
  background: #27c93f;
}

.hero-terminal__title {
  font-size: 12px;
  font-weight: 600;
  color: rgba(230, 238, 248, 0.85);
  font-family: ui-monospace, "Cascadia Code", "Consolas", monospace;
}

.hero-terminal__body {
  padding: 14px 14px 16px;
  font-family: ui-monospace, "Cascadia Code", "Consolas", monospace;
  font-size: 11px;
  line-height: 1.55;
  color: #a8f5c8;
}

@media (min-width: 640px) {
  .hero-terminal__body {
    font-size: 12px;
  }
}

.term-line {
  margin: 0 0 4px;
  white-space: pre-wrap;
  word-break: break-all;
}

.term-dim {
  color: #8fd9ff;
}

.term-out {
  color: #e2e8f0;
}

.term-line--pulse {
  animation: cmd-pulse 4s ease-in-out infinite;
}

@keyframes cmd-pulse {
  0%,
  100% {
    text-shadow: 0 0 0 transparent;
  }
  50% {
    text-shadow: 0 0 12px rgba(61, 220, 132, 0.55);
  }
}

.term-fade {
  opacity: 0;
  animation: term-reveal 0.6s ease forwards;
}

.term-fade--1 {
  animation-delay: 0.4s;
}
.term-fade--2 {
  animation-delay: 0.85s;
}
.term-fade--3 {
  animation-delay: 1.35s;
  color: #7dd3fc;
}
.term-fade--4 {
  animation-delay: 1.85s;
}
.term-fade--5 {
  animation-delay: 2.35s;
  color: #fde68a;
}

@keyframes term-reveal {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.term-cursor {
  margin: 6px 0 0;
}

.term-cursor span {
  display: inline-block;
  width: 8px;
  height: 15px;
  background: var(--android);
  vertical-align: text-bottom;
  animation: cursor-blink 1s step-end infinite;
}

@keyframes cursor-blink {
  50% {
    opacity: 0;
  }
}

.hero-terminal__badge {
  margin: 0 12px 12px;
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(224, 231, 255, 0.72);
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(125, 211, 252, 0.25);
  background: rgba(59, 130, 246, 0.1);
}

.hero-wifi {
  position: absolute;
  right: 8%;
  left: auto;
  top: 10%;
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  pointer-events: none;
}

.hero-wifi__rings {
  position: absolute;
  width: 72px;
  height: 72px;
  left: 50%;
  top: 42%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid rgba(125, 211, 252, 0.35);
  animation: wifi-ring 2.8s ease-out infinite;
}

.hero-wifi__rings::after {
  content: "";
  position: absolute;
  inset: -10px;
  border-radius: 50%;
  border: 1px solid rgba(125, 211, 252, 0.15);
  animation: wifi-ring 2.8s ease-out 0.9s infinite;
}

@keyframes wifi-ring {
  0% {
    transform: scale(0.85);
    opacity: 0.9;
  }
  100% {
    transform: scale(1.35);
    opacity: 0;
  }
}

.hero-wifi__icon {
  position: relative;
  width: 36px;
  height: 36px;
  color: #7dd3fc;
  filter: drop-shadow(0 0 10px rgba(125, 211, 252, 0.55));
}

.hero-wifi__label {
  position: relative;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(226, 248, 255, 0.88);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.45);
}

.hero-chip {
  position: absolute;
  z-index: 2;
  padding: 5px 10px;
  border-radius: 8px;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #0a1524;
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: chip-float 5s ease-in-out infinite;
}

.hero-chip--usb {
  left: 10%;
  top: 14%;
  background: linear-gradient(135deg, #fde68a, #f59e0b);
  animation-delay: 0s;
}
.hero-chip--tcp {
  right: 12%;
  top: 38%;
  background: linear-gradient(135deg, #93c5fd, #3b82f6);
  animation-delay: 0.6s;
}
.hero-chip--sh {
  left: 18%;
  top: 38%;
  background: linear-gradient(135deg, #6ee7b7, var(--android));
  animation-delay: 1.2s;
}

@keyframes chip-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px;
}

.section-title {
  margin: 0 0 8px;
  font-size: 1.625rem;
  letter-spacing: -0.02em;
}

.section-intro {
  margin: 0 0 32px;
  color: var(--color-text-muted);
  max-width: 52em;
}

.guide-section {
  scroll-margin-top: 88px;
}

.guide-intro {
  line-height: 1.75;
  font-size: 1.02rem;
}

.guide-article {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.guide-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
}

.prose {
  color: var(--color-text);
  font-size: 0.96875rem;
  line-height: 1.75;
}

.prose h3 {
  margin: 0 0 12px;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--color-primary);
}

.prose h3:not(:first-child) {
  margin-top: 22px;
}

.prose p {
  margin: 0 0 12px;
  color: var(--color-text-muted);
}

.prose p:last-child {
  margin-bottom: 0;
}

.prose ul {
  margin: 0 0 12px;
  padding-left: 1.2em;
  color: var(--color-text-muted);
}

.prose li {
  margin-bottom: 8px;
}

.prose li:last-child {
  margin-bottom: 0;
}

.prose strong {
  color: var(--color-text);
  font-weight: 600;
}

.guide-tip {
  margin-top: 12px !important;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: rgba(15, 61, 107, 0.06);
  border-left: 3px solid var(--color-accent);
  color: var(--color-text-muted) !important;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .features-grid {
    gap: 24px;
  }
}

.feature-card--wide {
  grid-column: 1 / -1;
}

.feature-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 22px 24px 24px;
  box-shadow: var(--shadow-md);
  transition: border-color 0.2s ease, transform 0.22s ease, box-shadow 0.22s ease;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.22s ease;
  background: radial-gradient(120% 80% at 10% 0%, rgba(37, 99, 235, 0.06), transparent 55%);
}

.feature-card:hover {
  border-color: var(--stroke-strong);
  transform: translateY(-3px);
  box-shadow: 0 16px 44px rgba(15, 23, 42, 0.12);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  border: 1px solid var(--color-border);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.feature-card:hover .feature-card-icon {
  transform: scale(1.08) rotate(-2deg);
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.12);
}

.feature-card-icon--cyan {
  background: rgba(6, 182, 212, 0.12);
  color: #0891b2;
  border-color: rgba(6, 182, 212, 0.25);
}

.feature-card-icon--blue {
  background: rgba(37, 99, 235, 0.1);
  color: #2563eb;
  border-color: rgba(37, 99, 235, 0.22);
}

.feature-card-icon--violet {
  background: rgba(139, 92, 246, 0.1);
  color: #7c3aed;
  border-color: rgba(139, 92, 246, 0.22);
}

.feature-card-icon--amber {
  background: rgba(245, 158, 11, 0.12);
  color: #d97706;
  border-color: rgba(245, 158, 11, 0.28);
}

.feature-card-icon--teal {
  background: rgba(13, 148, 136, 0.12);
  color: #0f766e;
  border-color: rgba(13, 148, 136, 0.28);
}

.feature-card h3 {
  margin: 0 0 12px;
  font-size: 1.125rem;
}

.feature-card ul {
  margin: 0;
  padding-left: 1.15em;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.feature-card li {
  margin-bottom: 6px;
}

.feature-card li:last-child {
  margin-bottom: 0;
}

.shots {
  background: linear-gradient(180deg, #eef1f6 0%, var(--color-bg) 100%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.shot-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 620px) {
  .shot-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .shot-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
}

.shot-item {
  margin: 0;
}

.shot-zoom {
  position: relative;
  display: block;
  width: 100%;
  padding: 12px;
  border: 1px solid var(--color-border);
  cursor: zoom-in;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform 0.2s, box-shadow 0.2s;
  overflow: hidden;
}

.shot-zoom:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.shot-zoom:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.shot-zoom img {
  border-radius: calc(var(--radius-lg) - 6px);
  width: 100%;
}

.shot-zoom__hint {
  position: absolute;
  right: 18px;
  bottom: 18px;
  z-index: 2;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #fff;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(15, 61, 107, 0.78);
  backdrop-filter: blur(6px);
  pointer-events: none;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.2s, transform 0.2s;
}

.shot-zoom:hover .shot-zoom__hint,
.shot-zoom:focus-visible .shot-zoom__hint {
  opacity: 1;
  transform: translateY(0);
}

.shot-caption {
  margin: 10px 4px 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: center;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(8, 12, 22, 0.86);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  cursor: zoom-out;
}

.lightbox[hidden] {
  display: none !important;
}

.lightbox-img {
  max-width: min(96vw, 520px);
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 14px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  cursor: default;
}

.lightbox-close {
  position: fixed;
  top: 18px;
  right: 22px;
  z-index: 310;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(0, 0, 0, 0.35);
  color: #fff;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  display: grid;
  place-items: center;
  transition: background 0.15s, transform 0.15s;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: scale(1.05);
}

.notice-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.notice-block p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.notice-block--privacy .privacy-lead {
  margin: 0 0 16px;
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--color-text);
  font-weight: 500;
}

.notice-block--privacy .privacy-list {
  margin: 0 0 16px;
  padding-left: 1.2em;
  color: var(--color-text-muted);
  font-size: 0.96875rem;
  line-height: 1.7;
}

.notice-block--privacy .privacy-list li {
  margin-bottom: 10px;
}

.notice-block--privacy .privacy-list li:last-child {
  margin-bottom: 0;
}

.notice-block--privacy .privacy-note {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.notice-block--privacy-simple .privacy-simple {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text-muted);
}

.notice-block--privacy-simple .privacy-simple p {
  margin: 0;
}

.contact-strip {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0a5c6a 100%);
  color: #fff;
  margin-top: 8px;
}

.contact-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}

@media (min-width: 720px) {
  .contact-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.contact-strip h2 {
  margin: 0 0 8px;
  font-size: 1.375rem;
  font-weight: 700;
}

.contact-strip p {
  margin: 0;
  opacity: 0.92;
  font-size: 0.9375rem;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.15);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.contact-email:hover {
  background: rgba(255, 255, 255, 0.22);
  text-decoration: none;
  color: #fff;
}

.site-footer {
  background: #141922;
  color: #9aa3b2;
  padding: 32px 24px 40px;
  font-size: 0.875rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-brand {
  color: #e8ecf2;
  font-weight: 600;
  margin-bottom: 8px;
}

.footer-meta {
  margin: 0 0 12px;
  line-height: 1.6;
}

.site-footer a {
  color: #9cbcf7;
}

.site-footer a:hover {
  color: #c4d4fc;
}

.footer-copy {
  margin: 16px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: #6b7280;
  font-size: 0.8125rem;
}

@media (max-width: 480px) {
  .lightbox-img {
    max-width: 100%;
  }
}