diff --git a/src/components/SongDisclaimer.vue b/src/components/SongDisclaimer.vue
new file mode 100644
index 0000000..5071208
--- /dev/null
+++ b/src/components/SongDisclaimer.vue
@@ -0,0 +1,22 @@
+<script setup>
+/* SongDisclaimer — 瘦金体版权免责声明 §3.5 */
+defineProps({
+  text: { type: String, default: '' }
+})
+defineOptions({ name: 'SongDisclaimer' })
+</script>
+
+<template>
+  <p class="song-disclaimer caption">
+    {{ text || '本页面中的瘦金体风格标识为艺术字图形，参考宋徽宗瘦金体书风自行绘制的 SVG 作品；未被授权的瘦金体字库文件不得用于任何商业用途。如需商业使用宋徽宗瘦金体风格字体，请联系相应字库权利人获取授权。' }}
+  </p>
+</template>
+
+<style scoped>
+.song-disclaimer {
+  margin: var(--song-space-4) 0 0;
+  color: var(--song-text-disabled);
+  line-height: 1.7;
+  opacity: 0.9;
+}
+</style>
\ No newline at end of file
diff --git a/src/components/SongLoading.vue b/src/components/SongLoading.vue
new file mode 100644
index 0000000..573f8f5
--- /dev/null
+++ b/src/components/SongLoading.vue
@@ -0,0 +1,105 @@
+<script setup>
+/* SongLoading — 水墨晕染加载 §7
+ * 墨点如滴入宣纸般扩散、敛去，合成层动效（transform/opacity only）
+ * mask: 全屏遮罩模式（弹层加载） */
+defineProps({
+  visible: { type: Boolean, default: true },
+  mask: { type: Boolean, default: false },
+  text: { type: String, default: '墨迹未干' }
+})
+defineOptions({ name: 'SongLoading' })
+</script>
+
+<template>
+  <div v-if="visible" class="song-loading" :class="{ 'song-loading--mask': mask }">
+    <div class="song-loading__inner">
+      <div class="song-loading__inks" aria-hidden="true">
+        <i class="song-loading__ink" />
+        <i class="song-loading__ink" />
+        <i class="song-loading__ink" />
+      </div>
+      <div class="song-loading__abs" aria-hidden="true" />
+      <span v-if="text" class="song-loading__text caption">{{ text }}</span>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.song-loading {
+  display: grid;
+  place-items: center;
+  padding: 40px 0;
+}
+.song-loading--mask {
+  position: fixed;
+  inset: 0;
+  z-index: 950;
+  background: var(--song-bg-elevated);
+  opacity: 0.96;
+}
+.song-loading__inner {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 18px;
+}
+.song-loading__inks {
+  position: relative;
+  width: 64px;
+  height: 64px;
+}
+.song-loading__ink {
+  position: absolute;
+  left: 50%;
+  top: 50%;
+  width: 40px;
+  height: 40px;
+  border-radius: 50%;
+  background: radial-gradient(circle, var(--song-primary) 0%, rgba(79, 120, 184, 0) 68%);
+  opacity: 0;
+  transform: translate(-50%, -50%) scale(0.3);
+  animation: song-ink-soak 2.4s var(--song-ease) infinite;
+}
+.song-loading__ink:nth-child(2) {
+  animation-delay: 0.8s;
+}
+.song-loading__ink:nth-child(3) {
+  animation-delay: 1.6s;
+}
+.song-loading__abs {
+  position: absolute;
+  left: 50%;
+  top: 50%;
+  width: 52px;
+  height: 52px;
+  margin: -26px 0 0 -26px;
+  border: 1px solid var(--song-border-strong);
+  border-radius: 50%;
+}
+.song-loading__text {
+  letter-spacing: 0.4em;
+  color: var(--song-text-secondary);
+}
+
+@keyframes song-ink-soak {
+  0% {
+    transform: translate(-50%, -50%) scale(0.3);
+    opacity: 0;
+  }
+  35% {
+    opacity: 0.85;
+  }
+  80% {
+    opacity: 0;
+  }
+  100% {
+    transform: translate(-50%, -50%) scale(1.15);
+    opacity: 0;
+  }
+}
+
+/* 合成层约束 §7 */
+.song-loading__ink {
+  will-change: transform, opacity;
+}
+</style>
\ No newline at end of file
diff --git a/src/components/SongLogo.vue b/src/components/SongLogo.vue
new file mode 100644
index 0000000..a4afd04
--- /dev/null
+++ b/src/components/SongLogo.vue
@@ -0,0 +1,30 @@
+<script setup>
+/* SongLogo — 品牌字为自行绘制的 SVG 图形作品，瘦金体风格，非字库文件。
+ * 契约 §3.5：仅作图形装饰，禁止作为段落排版字体。 */
+defineProps({
+  size: { type: Number, default: 40 }
+})
+defineOptions({ name: 'SongLogo' })
+</script>
+
+<template>
+  <svg class="song-logo" :width="size" :height="size" viewBox="0 0 48 48" role="img" aria-label="檐下">
+    <!-- 印章外框：细线方印 -->
+    <rect x="2" y="2" width="44" height="44" fill="none" stroke="currentColor" stroke-width="1.6" />
+    <!-- 檐（屋檐起翘意象）：长短撇掠，瘦劲屈铁 -->
+    <path d="M12 16 L36 10 L22 14 L12 16 M14 17 L16 8 M28 18 L31 9" fill="none" stroke="currentColor" stroke-linecap="round" stroke-width="2.2" />
+    <!-- 下（石柱/直棂意象）：>_ 结构感 -->
+    <path d="M16 28 L18 40 M32 28 L30 40 M12 30 L36 30 M18 37 L30 37 M21 34 L27 34" fill="none" stroke="currentColor" stroke-width="2" />
+    <path d="M20 26 L24 22 L28 26" fill="none" stroke="currentColor" stroke-width="1.8" />
+  </svg>
+</template>
+
+<style scoped>
+.song-logo {
+  color: var(--song-primary);
+  display: block;
+}
+:root[data-theme='dark'] .song-logo {
+  color: var(--song-primary);
+}
+</style>
\ No newline at end of file
diff --git a/src/components/SongScrim.vue b/src/components/SongScrim.vue
new file mode 100644
index 0000000..824e9ee
--- /dev/null
+++ b/src/components/SongScrim.vue
@@ -0,0 +1,105 @@
+<script setup>
+/* SongScrim — 纹样底纹合成器 §5
+ * 纹样均以 SVG 几何化矢量、低占比，置于内容之下。
+ * pattern: ice(冰裂纹) | blind(直棂窗) | tortoise(龟背纹) | vine(缠枝纹)
+ */
+defineProps({
+  pattern: { type: String, default: 'ice' },
+  opacity: { type: Number, default: 0.55 },
+  box: { type: Boolean, default: false }
+})
+defineOptions({ name: 'SongScrim' })
+
+const PATTERNS = {
+  ice: `
+    <svg xmlns="http://www.w3.org/2000/svg" width="220" height="220" viewBox="0 0 220 220">
+      <g fill="none" stroke="#6B7A86" stroke-width="1">
+        <path d="M0 40 40 0 M60 0 0 60 M40 40 90 90 M90 90 110 70 M0 90 90 0"/>
+        <path d="M120 0 90 30 M0 120 30 90 M110 110 60 160 M160 60 110 110 M90 90 160 160"/>
+        <path d="M220 40 180 0 M180 180 220 220 M40 220 0 180 M180 180 160 200 M200 160 180 180"/>
+      </g>
+    </svg>`,
+  blind: `
+    <svg xmlns="http://www.w3.org/2000/svg" width="120" height="120" viewBox="0 0 120 120">
+      <g fill="none" stroke="#6B7A86" stroke-width="1">
+        <path d="M0 0v120 M20 0v120 M40 0v120 M60 0v120 M80 0v120 M100 0v120 M120 0v120"/>
+      </g>
+    </svg>`,
+  tortoise: `
+    <svg xmlns="http://www.w3.org/2000/svg" width="120" height="120" viewBox="0 0 120 120">
+      <g fill="none" stroke="#6B7A86" stroke-width="1">
+        <path d="M30 8 60 21 30 34Z M60 21 90 8 90 34Z"/>
+        <path d="M30 34 60 60 30 86Z M60 60 90 34 90 86Z"/>
+        <path d="M30 8 30 60 0 38Z M90 8 90 60 120 38Z"/>
+        <path d="M30 86 0 64 0 92Z M90 86 120 64 120 92Z"/>
+      </g>
+    </svg>`,
+  vine: `
+    <svg xmlns="http://www.w3.org/2000/svg" width="120" height="60" viewBox="0 0 120 60">
+      <g fill="none" stroke="#6B7A86" stroke-width="1">
+        <path d="M0 30 Q15 10 30 30 T60 30 T90 30 T120 30"/>
+        <path d="M10 45 q0 -12 0 -24 M30 45 30 15 M50 45 50 15 M70 45 70 15 M90 45 90 15 M110 45 110 15"/>
+      </g>
+    </svg>`,
+  water: `
+    <svg xmlns="http://www.w3.org/2000/svg" width="120" height="120" viewBox="0 0 120 120">
+      <g fill="none" stroke="#6B7A86" stroke-width="1">
+        <path d="M20 40 q10 -8 20 0 q10 8 20 0 q10 -8 20 0 q10 8 20 0"/>
+        <path d="M10 64 q10 -8 20 0 q10 8 20 0 q10 -8 20 0 q10 8 20 0 q10 -8 20 0"/>
+        <path d="M30 88 q10 -8 20 0 q10 8 20 0 q10 -8 20 0"/>
+        <path d="M5 16 q10 -8 20 0 q10 8 20 0 q10 -8 20 0 q10 8 20 0 q10 -8 20 0 q10 8 20 0"/>
+      </g>
+    </svg>`,
+  cloud: `
+    <svg xmlns="http://www.w3.org/2000/svg" width="120" height="120" viewBox="0 0 120 120">
+      <g fill="none" stroke="#6B7A86" stroke-width="1">
+        <path d="M10 30 C10 12 30 8 34 24 C38 6 62 10 58 28 C78 18 90 34 76 46 C96 46 96 66 72 62 C82 78 60 88 54 74 C52 92 30 92 28 74 C12 84 2 68 18 60 C0 54 2 38 22 44 C14 34 16 18 30 24 C22 26 14 26 10 30 Z"/>
+      </g>
+    </svg>`
+}
+</script>
+
+<template>
+  <div class="song-scrim" :class="{ 'song-scrim--box': box }" aria-hidden="true">
+    <div
+      v-for="i in 4"
+      :key="i"
+      class="song-scrim__tile"
+      v-html="PATTERNS[pattern]"
+      :style="{ opacity }"
+    />
+  </div>
+</template>
+
+<style scoped>
+:global(.song-scrim) {
+  position: fixed;
+  inset: 0;
+  z-index: 0;
+  pointer-events: none;
+  overflow: hidden;
+  display: grid;
+  grid-template-columns: repeat(2, 1fr);
+  grid-template-rows: repeat(2, 1fr);
+  opacity: 0.9;
+}
+.song-scrim--box {
+  position: absolute !important;
+  border-radius: var(--song-radius-l);
+}
+.song-scrim--box :deep(svg) {
+  filter: opacity(0.55);
+}
+.song-scrim__tile {
+  width: 100%;
+  height: 100%;
+  mix-blend-mode: multiply;
+}
+.song-scrim__tile :deep(svg) {
+  width: 100%;
+  height: 100%;
+}
+:global([data-theme='dark']) .song-scrim__tile {
+  mix-blend-mode: screen;
+}
+</style>
\ No newline at end of file
diff --git a/src/components/SongSeal.vue b/src/components/SongSeal.vue
new file mode 100644
index 0000000..dfb78b7
--- /dev/null
+++ b/src/components/SongSeal.vue
@@ -0,0 +1,82 @@
+<script setup>
+/* SongSeal — 章印（钤印意象），SVG 自绘图形。
+ * 方印 ≤4 字（田字排布），圆印单字（连珠双圈）。
+ * color 默认 --song-seal（印泥砂红），rotate 模拟手钤微妙倾斜。 */
+import { computed } from 'vue'
+const props = defineProps({
+  text: { type: String, default: '檐下' },
+  round: { type: Boolean, default: false },
+  size: { type: Number, default: 76 },
+  rotate: { type: Number, default: -2 }
+})
+defineOptions({ name: 'SongSeal' })
+
+const chars = computed(() => props.text.slice(0, props.round ? 1 : 4).split(''))
+const fd = computed(() => {
+  const n = chars.value.length
+  return n <= 1 ? 1 : n === 2 ? [0, 1] : [0, 1, 2, 3]
+})
+</script>
+
+<template>
+  <svg
+    class="song-seal"
+    :width="size"
+    :height="size"
+    :viewBox="round ? '0 0 64 64' : '0 0 72 72'"
+    role="img"
+    :aria-label="`印章：${text}`"
+    :style="{ transform: `rotate(${rotate}deg)` }"
+  >
+    <!-- 方印：田字界格 + 2×2 文字 -->
+    <g v-if="!round" fill="none" stroke="currentColor">
+      <rect x="2" y="2" width="68" height="68" rx="3" />
+      <line v-if="fd.length > 1" x1="36" y1="2" x2="36" y2="70" />
+      <line v-if="fd.length > 2" x1="2" y1="36" x2="70" y2="36" />
+    </g>
+    <!-- 圆印：连珠双圈 + 单字 -->
+    <g v-else fill="none" stroke="currentColor">
+      <circle cx="32" cy="32" r="28" />
+      <circle cx="32" cy="32" r="21" />
+    </g>
+    <g
+      v-if="!round"
+      fill="currentColor"
+      fill-opacity="0.88"
+      font-family="var(--song-font-serif)"
+      font-weight="600"
+      text-anchor="middle"
+      dominant-baseline="central"
+    >
+      <text v-for="(c, i) in chars" :key="i"
+        :x="36 + (i % 2 === 0 ? -18 : 18)"
+        :y="36 + (i < 2 ? -18 : 18)"
+        opacity="0.72"
+      >{{ c }}</text>
+    </g>
+    <text
+      v-else
+      x="32" y="32"
+      fill="currentColor"
+      fill-opacity="0.88"
+      font-family="var(--song-font-serif)"
+      font-weight="600"
+      font-size="22"
+      text-anchor="middle"
+      dominant-baseline="central"
+    >{{ chars[0] }}</text>
+  </svg>
+</template>
+
+<style scoped>
+.song-seal {
+  color: var(--song-seal, #a84635);
+  display: block;
+  opacity: 0.9;
+  transition: transform var(--song-dur-2) var(--song-ease);
+}
+.song-seal:hover {
+  opacity: 1;
+  transform: rotate(-1deg) !important;
+}
+</style>
\ No newline at end of file