/* ============================================================
   Savorland 悦喜大陆 · 首页云海场景样式 v2（2026-10-16）
   3A 级黄金时刻光影构图：
     天空渐变（地平线亮带）→ 太阳泛光/光轴/宽荧幕炫光 →
     远山（重雾化）→ 中景山脊 → 体积云海 → 近山+城邦 →
     前景雾纱 → 光尘 → 暗角 + 胶片颗粒
   零新增网络依赖；动画只用 transform/opacity（合成器友好）。
   ============================================================ */

:root {
  --sv-sky-top: #07131c;
  --sv-sky-mid: #14323c;
  --sv-sky-low: #2c5560;
  --sv-horizon: #e7b878;
  --sv-horizon-2: #f3d6a0;
  --sv-cloud-light: #f4e7cf;
  --sv-cloud-warm: #f0cf9a;
  --sv-cloud-shadow: #6c8791;
  --sv-cloud-deep: #2b4651;
  --sv-mtn-far: #6f8da0;
  --sv-mtn-mid: #3d5a66;
  --sv-mtn-near: #16242b;
  --sv-city: #0e171c;
  --sv-rim: #d8b074;
  --sv-ink: #f3ead7;
  --sv-gold: #e9c684;
  --sv-sun-x: 63%;   /* 主光位置：与 savorland_scene.js 的 SUN 保持一致 */
  --sv-sun-y: 40%;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; height: 100%; }

body.sv-body {
  background: var(--sv-sky-top);
  color: var(--sv-ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  overflow: hidden;
  height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.sv-stage { position: fixed; inset: 0; overflow: hidden; }

/* 摄影机层：整体呼吸漂移在此叠加（分层视差在子元素上） */
.sv-camera {
  position: absolute; inset: 0;
  will-change: transform;
  transform-origin: 50% 44%;
}

/* ---------- 天空与晨光（地平线亮带 + 太阳径向辉光） ---------- */
.sv-sky {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(56% 32% at var(--sv-sun-x) var(--sv-sun-y),
      rgba(255,244,214,0.85) 0%,
      rgba(250,214,158,0.50) 30%,
      rgba(240,190,130,0.16) 55%,
      rgba(240,190,130,0) 75%),
    radial-gradient(120% 44% at 50% 46%,
      rgba(120,152,152,0.16) 0%,
      rgba(24,54,64,0) 60%),
    linear-gradient(180deg,
      #071220 0%,
      #0c2230 20%,
      #143746 33%,
      #27525e 40%,
      #9aa191 45%,
      #5e6d68 54%,
      #3c4c50 70%,
      #2c3d43 100%);
}
.sv-sun {
  position: absolute; z-index: 1;
  left: var(--sv-sun-x); top: var(--sv-sun-y);
  width: 62vmax; height: 44vmax;
  transform: translate(-50%, -50%);
  background: radial-gradient(closest-side,
    rgba(255,243,215,0.66) 0%,
    rgba(248,210,155,0.30) 32%,
    rgba(248,208,152,0.09) 55%,
    rgba(248,208,152,0) 76%);
  filter: blur(4px);
  pointer-events: none;
}

/* ---------- 体积光轴（太阳方向） ---------- */
.sv-shafts {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: repeating-conic-gradient(from 6deg at var(--sv-sun-x) var(--sv-sun-y),
    rgba(255,236,198,0.055) 0deg 1.6deg,
    rgba(255,236,198,0.014) 1.6deg 3.2deg,
    transparent 3.2deg 15deg);
  -webkit-mask-image: radial-gradient(85% 62% at var(--sv-sun-x) var(--sv-sun-y), #000 0%, transparent 72%);
  mask-image: radial-gradient(85% 62% at var(--sv-sun-x) var(--sv-sun-y), #000 0%, transparent 72%);
  transform-origin: var(--sv-sun-x) var(--sv-sun-y);
  animation: sv-shafts-turn 140s linear infinite;
  will-change: transform;
}
@keyframes sv-shafts-turn {
  from { transform: rotate(0deg); }
  to   { transform: rotate(5deg); }
}

/* ---------- 宽荧幕炫光条（anamorphic streak） ---------- */
.sv-streak {
  position: absolute; z-index: 1; pointer-events: none;
  left: var(--sv-sun-x); top: var(--sv-sun-y);
  width: 58vmax; height: 3px;
  transform: translate(-50%, -50%);
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(255,240,214,0.28) 22%,
    rgba(255,247,226,0.80) 50%,
    rgba(255,240,214,0.28) 78%,
    transparent 100%);
  filter: blur(3px);
  animation: sv-streak-breathe 9s ease-in-out infinite;
  will-change: opacity, transform;
}
@keyframes sv-streak-breathe {
  0%, 100% { opacity: 0.55; transform: translate(-50%,-50%) scaleX(1); }
  50%      { opacity: 0.85; transform: translate(-50%,-50%) scaleX(1.06); }
}

/* ---------- 山体（远 / 中 / 近）与城邦：分层大气透视 ---------- */
.sv-mountains-far, .sv-mtn-mid, #scene-svg {
  position: absolute; left: 0; right: 0; bottom: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  will-change: transform;
}
.sv-mountains-far { z-index: 2; opacity: 0.85; }
.sv-mtn-mid { z-index: 2; }
#scene-svg { z-index: 3; }

/* ---------- 体积云海（Canvas，全屏：卷云 + 云海 + 云影） ---------- */
#cloud-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  z-index: 4;
  pointer-events: none;
  opacity: 0;
  transition: opacity 1.2s ease 0.15s;
}
#cloud-canvas.sv-ready { opacity: 1; }

/* ---------- 漂移雾气（前景 veil） ---------- */
.sv-fog {
  position: absolute; left: -20%; right: -20%; bottom: -6%;
  height: 62%;
  z-index: 5;
  pointer-events: none;
  background-repeat: repeat-x;
  will-change: transform, opacity;
}
.sv-fog-1 {
  background:
    radial-gradient(64% 108% at 20% 100%, rgba(244,231,207,0.40) 0%, rgba(244,231,207,0) 76%),
    radial-gradient(58% 108% at 62% 100%, rgba(232,222,205,0.32) 0%, rgba(232,222,205,0) 78%),
    radial-gradient(50% 108% at 90% 100%, rgba(244,231,207,0.28) 0%, rgba(244,231,207,0) 76%);
  animation: sv-fog-drift 46s linear infinite;
  opacity: 0.72;
}
.sv-fog-2 {
  bottom: -2%; height: 46%;
  background:
    radial-gradient(54% 108% at 40% 100%, rgba(214,226,228,0.28) 0%, rgba(214,226,228,0) 80%),
    radial-gradient(48% 108% at 78% 100%, rgba(200,216,220,0.24) 0%, rgba(200,216,220,0) 82%);
  animation: sv-fog-drift2 71s linear infinite;
  opacity: 0.62;
}
@keyframes sv-fog-drift {
  0%   { transform: translate3d(0,0,0) scaleY(1); }
  50%  { transform: translate3d(-6%,-1.5%,0) scaleY(1.06); }
  100% { transform: translate3d(0,0,0) scaleY(1); }
}
@keyframes sv-fog-drift2 {
  0%   { transform: translate3d(0,0,0); }
  50%  { transform: translate3d(5%,1%,0); }
  100% { transform: translate3d(0,0,0); }
}

/* ---------- 光尘 ---------- */
#mote-canvas {
  position: absolute; inset: 0;
  z-index: 6; pointer-events: none;
}

/* ---------- 鸟群 ---------- */
#sv-birds {
  position: absolute; inset: 0; z-index: 6; pointer-events: none;
}
.sv-bird {
  position: absolute; left: 0; top: 0;
  opacity: 0;
  will-change: transform, opacity;
}
.sv-bird svg {
  display: block;
  animation: sv-bird-flap 0.26s ease-in-out infinite alternate;
}
@keyframes sv-bird-flap {
  from { transform: scaleY(1); }
  to   { transform: scaleY(0.42); }
}

/* ---------- 调色：暗角 + 颗粒 + 轻度泛光 ---------- */
.sv-vignette {
  position: absolute; inset: 0; z-index: 7; pointer-events: none;
  background:
    radial-gradient(135% 115% at 50% 46%,
      rgba(2,8,12,0) 54%, rgba(3,10,15,0.34) 80%, rgba(2,8,13,0.58) 100%);
}
.sv-grain {
  position: absolute; inset: -50%; z-index: 8; pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  animation: sv-grain-shift 0.6s steps(2) infinite;
}
@keyframes sv-grain-shift {
  0% { transform: translate(0,0); }
  100% { transform: translate(-4%,3%); }
}

/* ---------- 叙事文字（缓慢上浮） ---------- */
.sv-scroll {
  position: absolute; z-index: 9;
  left: clamp(1.2rem, 5vw, 4.5rem);
  top: clamp(3.2rem, 12vh, 7rem);
  max-width: min(40vw, 30rem);
  pointer-events: none;
  text-shadow: 0 2px 18px rgba(0,0,0,0.55);
}
.sv-scroll .sv-world {
  font-family: "Songti SC", "STSong", "Noto Serif SC", "PingFang SC", serif;
  font-size: clamp(2.1rem, 5.2vw, 3.6rem);
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--sv-ink);
  line-height: 1.1;
  background: linear-gradient(180deg, #fff7e8, var(--sv-gold));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.sv-scroll .sv-line {
  margin-top: 0.7rem;
  font-size: clamp(0.92rem, 1.5vw, 1.12rem);
  letter-spacing: 0.16em;
  color: rgba(243,234,215,0.82);
  opacity: 0;
  transform: translateY(14px);
  animation: sv-rise 1.1s ease forwards;
}
.sv-scroll .sv-line:nth-child(2) { animation-delay: 0.5s; }
.sv-scroll .sv-line:nth-child(3) { animation-delay: 1.1s; }
.sv-scroll .sv-line:nth-child(4) { animation-delay: 1.7s; }
.sv-scroll .sv-line:nth-child(5) { animation-delay: 2.3s; }
@keyframes sv-rise {
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 登录玻璃面板 ---------- */
.sv-login {
  position: absolute; z-index: 10;
  right: clamp(1rem, 6vw, 5rem);
  top: 50%;
  transform: translateY(-50%);
  width: min(92vw, 372px);
  padding: 1.9rem 1.7rem 1.6rem;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(20,34,41,0.62), rgba(10,20,26,0.52));
  border: 1px solid rgba(233,198,132,0.28);
  box-shadow: 0 24px 70px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.08);
  backdrop-filter: blur(12px) saturate(1.1);
  -webkit-backdrop-filter: blur(12px) saturate(1.1);
  color: var(--sv-ink);
}
.sv-login .sv-logo {
  display: flex; justify-content: center; margin-bottom: 0.5rem;
}
.sv-login .sv-logo img {
  height: 46px; width: auto;
  /* 去底米色金 LOGO：暗色分离阴影 + 暖光晕，保证深底上不被淹没 */
  filter: drop-shadow(0 2px 10px rgba(0,0,0,0.55)) drop-shadow(0 0 16px rgba(233,198,132,0.16));
}
.sv-login .sv-title {
  text-align: center; font-size: 1.35rem; letter-spacing: 0.5em;
  font-weight: 600; margin: 0.2rem 0 1.1rem; padding-left: 0.5em;
  color: #fff7e8;
}
.sv-flash {
  border-radius: 10px; padding: 0.55rem 0.7rem; margin-bottom: 0.8rem;
  font-size: 0.8rem; line-height: 1.4;
}
.sv-flash.error { background: rgba(178,58,58,0.22); border: 1px solid rgba(220,90,90,0.5); color: #ffd9d9; }
.sv-flash.ok    { background: rgba(60,150,110,0.22); border: 1px solid rgba(90,200,150,0.5); color: #d6ffe9; }
.sv-flash.warn  { background: rgba(190,150,70,0.20); border: 1px solid rgba(220,180,90,0.5); color: #ffeec2; }

.sv-field { margin-bottom: 0.85rem; }
.sv-field label {
  display: block; font-size: 0.78rem; letter-spacing: 0.12em;
  color: rgba(243,234,215,0.78); margin-bottom: 0.35rem;
}
.sv-input {
  width: 100%; padding: 0.72rem 0.85rem;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(233,198,132,0.25);
  border-radius: 11px; color: var(--sv-ink);
  font-size: 0.95rem; outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.sv-input::placeholder { color: rgba(243,234,215,0.4); }
.sv-input:focus {
  border-color: var(--sv-gold);
  background: rgba(255,255,255,0.1);
  box-shadow: 0 0 0 3px rgba(233,198,132,0.18);
}
.sv-btn {
  width: 100%; margin-top: 0.35rem; padding: 0.78rem;
  border: none; border-radius: 11px; cursor: pointer;
  font-size: 1rem; letter-spacing: 0.35em; padding-left: 0.35em;
  font-weight: 600; color: #2a1c08;
  background: linear-gradient(180deg, #f6dca2, #e3b06a);
  box-shadow: 0 10px 26px rgba(214,160,90,0.35);
  transition: transform 0.12s, box-shadow 0.2s, filter 0.2s;
}
.sv-btn:hover { filter: brightness(1.05); box-shadow: 0 14px 32px rgba(214,160,90,0.45); }
.sv-btn:active { transform: translateY(1px); }

.sv-wx {
  display: flex; align-items: center; justify-content: center; gap: 0.5rem;
  width: 100%; margin-top: 0.7rem; padding: 0.7rem;
  border-radius: 11px; cursor: pointer; text-decoration: none;
  font-size: 0.92rem; letter-spacing: 0.08em; font-weight: 600;
  color: #fff; background: rgba(255,255,255,0.08);
  border: 1px solid rgba(120,200,140,0.5);
  transition: background 0.2s, border-color 0.2s;
}
.sv-wx:hover { background: rgba(70,180,110,0.22); border: 1px solid rgba(120,220,150,0.8); }
.sv-wx svg { flex: none; }
/* 未开通微信凭证：入口仍可见但明确标注，避免用户以为没有微信登录 */
.sv-wx.is-pending { border-style: dashed; border-color: rgba(150,160,170,0.42); color: rgba(240,244,246,0.72); }
.sv-wx.is-pending:hover { background: rgba(255,255,255,0.1); border-color: rgba(180,190,200,0.6); }
.sv-wx-tag {
  font-style: normal; font-size: 0.62rem; font-weight: 400; letter-spacing: 0.04em;
  padding: 0.12rem 0.42rem; border-radius: 999px;
  color: rgba(226,206,168,0.9); background: rgba(226,206,168,0.14);
  border: 1px solid rgba(226,206,168,0.32);
}

.sv-sep {
  display: flex; align-items: center; gap: 0.6rem;
  margin: 0.95rem 0; color: rgba(243,234,215,0.45);
  font-size: 0.72rem; letter-spacing: 0.1em;
}
.sv-sep::before, .sv-sep::after {
  content: ""; flex: 1; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(233,198,132,0.3), transparent);
}
.sv-links { text-align: center; font-size: 0.82rem; margin: 0.9rem 0 0.2rem; color: rgba(243,234,215,0.8); }
.sv-links a { color: var(--sv-gold); text-decoration: none; }
.sv-links a:hover { text-decoration: underline; }
.sv-hint { text-align: center; font-size: 0.72rem; line-height: 1.5; color: rgba(243,234,215,0.55); margin: 0; }

/* ---------- 顶部品牌条 ---------- */
.sv-topbar {
  position: absolute; z-index: 10; top: 0; left: 0; right: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem clamp(1.2rem, 5vw, 4.5rem);
  pointer-events: none;
}
.sv-topbar .sv-mark {
  display: flex; align-items: stretch; gap: 0.72rem;
  font-family: "Songti SC", "STSong", serif; font-weight: 700;
  color: #fff7e8;
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
}
.sv-topbar .sv-mark-col { display: flex; flex-direction: column; justify-content: center; align-items: flex-start; gap: 0.14rem; }
.sv-topbar .sv-mark-cn { font-size: 1.05rem; letter-spacing: 0.2em; line-height: 1.1; }
.sv-topbar .sv-mark-en { font-size: 0.56rem; letter-spacing: 0.05em; color: rgba(243,234,215,0.62); font-weight: 400; line-height: 1.1; white-space: nowrap; }
.sv-topbar .sv-mark-bar {
  width: 1px; align-self: stretch; margin: 0.1rem 0;
  background: linear-gradient(180deg, transparent, rgba(243,234,215,0.6) 20%, rgba(243,234,215,0.6) 80%, transparent);
}
.sv-topbar .sv-nav { pointer-events: auto; display: flex; gap: 1.3rem; font-size: 0.85rem; letter-spacing: 0.1em; }
.sv-topbar .sv-nav a { color: rgba(243,234,215,0.85); text-decoration: none; text-shadow: 0 1px 8px rgba(0,0,0,0.5); }
.sv-topbar .sv-nav a:hover { color: var(--sv-gold); }

/* ---------- 页脚备案 ---------- */
.sv-footer {
  position: absolute; z-index: 10; left: 0; right: 0; bottom: 0;
  text-align: center; padding: 0.7rem 1rem 0.85rem;
  font-size: 0.7rem; letter-spacing: 0.06em; color: rgba(243,234,215,0.62);
  text-shadow: 0 1px 6px rgba(0,0,0,0.6);
  background: linear-gradient(180deg, transparent, rgba(3,10,15,0.45));
}
.sv-footer a { color: rgba(243,234,215,0.78); text-decoration: none; }
.sv-footer a:hover { color: var(--sv-gold); }
.sv-footer .sv-sep2 { margin: 0 0.45rem; opacity: 0.5; }
.sv-footer img { width: 15px; height: auto; vertical-align: middle; margin-right: 0.2rem; }

/* ---------- 响应式：窄屏改为底部卡片 ---------- */
@media (max-width: 720px) {
  .sv-login {
    right: 50%; top: auto; bottom: 4.4rem;
    transform: translateX(50%);
    width: min(94vw, 380px);
    padding: 1.4rem 1.3rem 1.3rem;
  }
  .sv-scroll { top: 4.2rem; max-width: 82vw; }
  .sv-scroll .sv-world { font-size: clamp(1.8rem, 8vw, 2.4rem); }
  .sv-topbar { padding: 0.8rem 1rem; }
  .sv-topbar .sv-nav { display: none; }
  .sv-footer { font-size: 0.6rem; line-height: 1.55; padding: 0.5rem 0.9rem 0.7rem; }
  .sv-footer img { display: none; }
  .sv-footer .sv-sep2 { margin: 0 0.3rem; }
  .sv-fog-1, .sv-fog-2 { height: 50%; }
  /* 低端机省电：关光轴与炫光条，颗粒保留 */
  .sv-shafts, .sv-streak { display: none; }
}

/* 性能 Lite 模式：看门狗判定持续掉帧时由 JS 挂 body.sv-lite */
body.sv-lite .sv-shafts,
body.sv-lite .sv-streak,
body.sv-lite .sv-grain { display: none; }

/* 尊重「减少动态效果」偏好 */
@media (prefers-reduced-motion: reduce) {
  .sv-fog-1, .sv-fog-2, .sv-grain, .sv-shafts, .sv-streak, .sv-bird svg { animation: none; }
  .sv-scroll .sv-line { animation: none; opacity: 1; transform: none; }
}